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Portal:Medicine






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The Medicine Portal

The color fresco Care of The SickbyDomenico di Bartolo, 1441–1442, depicting the Santa Maria della Scala hospital in Siena, Italy

Medicine is the science and practice of caring for patients, managing the diagnosis, prognosis, prevention, treatment, palliation of their injuryordisease, and promoting their health. Medicine encompasses a variety of health care practices evolved to maintain and restore health by the prevention and treatment of illness. Contemporary medicine applies biomedical sciences, biomedical research, genetics, and medical technologytodiagnose, treat, and prevent injury and disease, typically through pharmaceuticalsorsurgery, but also through therapies as diverse as psychotherapy, external splints and traction, medical devices, biologics, and ionizing radiation, amongst others.

Medicine has been practiced since prehistoric times, and for most of this time it was an art (an area of creativity and skill), frequently having connections to the religious and philosophical beliefs of local culture. For example, a medicine man would apply herbs and say prayers for healing, or an ancient philosopher and physician would apply bloodletting according to the theories of humorism. In recent centuries, since the advent of modern science, most medicine has become a combination of art and science (both basic and applied, under the umbrellaofmedical science). For example, while stitching technique for sutures is an art learned through practice, knowledge of what happens at the cellular and molecular level in the tissues being stitched arises through science.

Prescientific forms of medicine, now known as traditional medicineorfolk medicine, remain commonly used in the absence of scientific medicine and are thus called alternative medicine. Alternative treatments outside of scientific medicine with ethical, safety and efficacy concerns are termed quackery. (Full article...)

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Hirudo medicinalis sucking blood

Leeches are segmented parasiticorpredatory worms that comprise the subclass Hirudinea within the phylum Annelida. They are closely related to the oligochaetes, which include the earthworm, and like them have soft, muscular segmented bodies that can lengthen and contract. Both groups are hermaphrodites and have a clitellum, but leeches typically differ from the oligochaetes in having suckers at both ends and in having ring markings that do not correspond with their internal segmentation. The body is muscular and relatively solid, and the coelom, the spacious body cavity found in other annelids, is reduced to small channels.

The majority of leeches live in freshwater habitats, while some species can be found in terrestrial or marine environments. The best-known species, such as the medicinal leech, Hirudo medicinalis, are hematophagous, attaching themselves to a host with a sucker and feeding on blood, having first secreted the peptide hirudin to prevent the blood from clotting. The jaws used to pierce the skin are replaced in other species by a proboscis which is pushed into the skin. A minority of leech species are predatory, mostly preying on small invertebrates. (Full article...)
  • Image 2 Holmes, c. 1879 Oliver Wendell Holmes Sr. (/hoʊmz/; August 29, 1809 – October 7, 1894) was an American physician, poet, and polymath based in Boston. Grouped among the fireside poets, he was acclaimed by his peers as one of the best writers of the day. His most famous prose works are the "Breakfast-Table" series, which began with The Autocrat of the Breakfast-Table (1858). He was also an important medical reformer. In addition to his work as an author and poet, Holmes also served as a physician, professor, lecturer, inventor, and, although he never practiced it, he received formal training in law. Born in Cambridge, Massachusetts, Holmes was educated at Phillips Academy and Harvard College. After graduating from Harvard in 1829, he briefly studied law before turning to the medical profession. He began writing poetry at an early age; one of his most famous works, "Old Ironsides", was published in 1830 and was influential in the eventual preservation of the USS Constitution. Following training at the prestigious medical schools of Paris, Holmes was granted his Doctor of Medicine degree from Harvard Medical School in 1836. He taught at Dartmouth Medical School before returning to teach at Harvard and, for a time, served as dean there. During his long professorship, he became an advocate for various medical reforms and notably posited the controversial idea that doctors were capable of carrying puerperal fever from patient to patient. Holmes retired from Harvard in 1882 and continued writing poetry, novels and essays until his death in 1894. (Full article...)


    Holmes, c. 1879

    Oliver Wendell Holmes Sr. (/hmz/; August 29, 1809 – October 7, 1894) was an American physician, poet, and polymath based in Boston. Grouped among the fireside poets, he was acclaimed by his peers as one of the best writers of the day. His most famous prose works are the "Breakfast-Table" series, which began with The Autocrat of the Breakfast-Table (1858). He was also an important medical reformer. In addition to his work as an author and poet, Holmes also served as a physician, professor, lecturer, inventor, and, although he never practiced it, he received formal training in law.

    Born in Cambridge, Massachusetts, Holmes was educated at Phillips Academy and Harvard College. After graduating from Harvard in 1829, he briefly studied law before turning to the medical profession. He began writing poetry at an early age; one of his most famous works, "Old Ironsides", was published in 1830 and was influential in the eventual preservation of the USS Constitution. Following training at the prestigious medical schools of Paris, Holmes was granted his Doctor of Medicine degree from Harvard Medical School in 1836. He taught at Dartmouth Medical School before returning to teach at Harvard and, for a time, served as dean there. During his long professorship, he became an advocate for various medical reforms and notably posited the controversial idea that doctors were capable of carrying puerperal fever from patient to patient. Holmes retired from Harvard in 1882 and continued writing poetry, novels and essays until his death in 1894. (Full article...)
  • Image 3 Taare Zameen Par (lit. 'Stars on Earth'), also known as Like Stars on Earth in English, is a 2007 Indian Hindi-language musical drama film produced and directed by Aamir Khan. It stars Khan himself, with Darsheel Safary, Tanay Chheda, Vipin Sharma and Tisca Chopra. It explores the life and imagination of Ishaan (Safary), an artistically gifted 8-year-old boy whose poor academic performance leads his parents to send him to a boarding school, where a new art teacher Nikumbh (Khan) suspects that he is dyslexic and helps him to overcome his reading disorder. Creative director and writer Amole Gupte developed the idea with his wife Deepa Bhatia, who was the film's editor. Shankar–Ehsaan–Loy composed the score, and Prasoon Joshi wrote the lyrics for many of the songs. Principal photography took place in Mumbai, and in Panchgani's New Era High School, where some of the school's students participated in the filming. (Full article...)

    Taare Zameen Par (lit.'Stars on Earth'), also known as Like Stars on Earth in English, is a 2007 Indian Hindi-language musical drama film produced and directed by Aamir Khan. It stars Khan himself, with Darsheel Safary, Tanay Chheda, Vipin Sharma and Tisca Chopra. It explores the life and imagination of Ishaan (Safary), an artistically gifted 8-year-old boy whose poor academic performance leads his parents to send him to a boarding school, where a new art teacher Nikumbh (Khan) suspects that he is dyslexic and helps him to overcome his reading disorder.

    Creative director and writer Amole Gupte developed the idea with his wife Deepa Bhatia, who was the film's editor. Shankar–Ehsaan–Loy composed the score, and Prasoon Joshi wrote the lyrics for many of the songs. Principal photography took place in Mumbai, and in Panchgani's New Era High School, where some of the school's students participated in the filming. (Full article...)

  • Image 4 The 1966 New York City smog was a major air-pollution episode and environmental disaster, coinciding with that year's Thanksgiving holiday weekend. Smog covered the city and its surrounding area from November 23 to 26, filling the city's air with damaging levels of several toxic pollutants. It was the third major smog in New York City, following events of similar scale in 1953 and 1963. On November 23, a large mass of stagnant air over the East Coast trapped pollutants in the city's air. For three days, New York City was engulfed in dangerously high levels of carbon monoxide, sulfur dioxide, smoke, and haze. Pockets of air pollution pervaded the greater New York metropolitan area, including parts of New Jersey and Connecticut. By November 25, the smog became severe enough that regional leaders announced a "first-stage alert". During the alert, leaders of local and state governments asked residents and industry to take voluntary steps to minimize emissions. Health officials advised people with respiratory or heart conditions to remain indoors. The city shut off garbage incinerators, requiring massive hauling of garbage to landfills. A cold front dispersed the smog on November 26, and the alert ended. (Full article...)

    The 1966 New York City smog was a major air-pollution episode and environmental disaster, coinciding with that year's Thanksgiving holiday weekend. Smog covered the city and its surrounding area from November 23 to 26, filling the city's air with damaging levels of several toxic pollutants. It was the third major smog in New York City, following events of similar scale in 1953 and 1963.

    On November 23, a large mass of stagnant air over the East Coast trapped pollutants in the city's air. For three days, New York City was engulfed in dangerously high levels of carbon monoxide, sulfur dioxide, smoke, and haze. Pockets of air pollution pervaded the greater New York metropolitan area, including parts of New Jersey and Connecticut. By November 25, the smog became severe enough that regional leaders announced a "first-stage alert". During the alert, leaders of local and state governments asked residents and industry to take voluntary steps to minimize emissions. Health officials advised people with respiratory or heart conditions to remain indoors. The city shut off garbage incinerators, requiring massive hauling of garbage to landfills. A cold front dispersed the smog on November 26, and the alert ended. (Full article...)

  • Image 5 Everywhere at the End of Time is the eleventh recording by the Caretaker, an alias of English electronic musician Leyland Kirby. Released between 2016 and 2019, its six studio albums use degrading loops of sampled ballroom music to portray the progression of Alzheimer's disease. Inspired by the success of An Empty Bliss Beyond This World (2011), Kirby produced Everywhere as his final major work under the alias. The albums were produced in Kraków and released over six-month periods to "give a sense of time passing", with abstract album covers by his friend Ivan Seal. The series drew comparisons to the works of composer William Basinski and electronic musician Burial, while the later stages were influenced by avant-gardist composer John Cage. The series comprises six hours of music, portraying a range of emotions and characterised by noise throughout. Although the first three stages are similar to An Empty Bliss, the last three depart from Kirby's earlier ambient works. The albums reflect the patient's disorder and death, their feelings, and the phenomenon of terminal lucidity. To promote the series, anonymous visual artist Weirdcore created music videos for the first two stages. At first, concerned about whether the series would seem pretentious, Kirby thought of not creating Everywhere at all, and spent more time producing it than any of his other releases. The album covers received attention from a French art exhibition named after the Caretaker's Everywhere, an Empty Bliss (2019), a compilation of archived songs. (Full article...)

    Everywhere at the End of Time is the eleventh recording by the Caretaker, an alias of English electronic musician Leyland Kirby. Released between 2016 and 2019, its six studio albums use degrading loopsofsampled ballroom music to portray the progression of Alzheimer's disease. Inspired by the success of An Empty Bliss Beyond This World (2011), Kirby produced Everywhere as his final major work under the alias. The albums were produced in Kraków and released over six-month periods to "give a sense of time passing", with abstract album covers by his friend Ivan Seal. The series drew comparisons to the works of composer William Basinski and electronic musician Burial, while the later stages were influenced by avant-gardist composer John Cage.

    The series comprises six hours of music, portraying a range of emotions and characterised by noise throughout. Although the first three stages are similar to An Empty Bliss, the last three depart from Kirby's earlier ambient works. The albums reflect the patient's disorder and death, their feelings, and the phenomenon of terminal lucidity. To promote the series, anonymous visual artist Weirdcore created music videos for the first two stages. At first, concerned about whether the series would seem pretentious, Kirby thought of not creating Everywhere at all, and spent more time producing it than any of his other releases. The album covers received attention from a French art exhibition named after the Caretaker's Everywhere, an Empty Bliss (2019), a compilation of archived songs. (Full article...)

  • Image 6 Diagram of prostate tumor pressing on urethra Prostate cancer is the uncontrolled growth of cells in the prostate, a gland in the male reproductive system below the bladder. Abnormal growth of prostate tissue is usually detected through screening tests, typically blood tests that check for prostate-specific antigen (PSA) levels. Those with high levels of PSA in their blood are at increased risk for developing prostate cancer. Diagnosis requires a biopsy of the prostate. If cancer is present, the pathologist assigns a Gleason score, and a higher score represents a more dangerous tumor. Medical imaging is performed to look for cancer that has spread outside the prostate. Based on the Gleason score, PSA levels, and imaging results, a cancer case is assigned a stage 1 to 4. A higher stage signifies a more advanced, more dangerous disease. Most prostate tumors remain small and cause no health problems. These are managed with active surveillance, monitoring the tumor with regular tests to ensure it has not grown. Tumors more likely to be dangerous can be destroyed with radiation therapy or surgically removed by radical prostatectomy. Those whose cancer spreads beyond the prostate are treated with hormone therapy which reduces levels of the androgens (male sex hormones) that prostate cells need to survive. Eventually cancer cells can grow resistant to this treatment. This most-advanced stage of the disease, called castration-resistant prostate cancer, is treated with continued hormone therapy alongside the chemotherapy drug docetaxel. Some tumors metastasize (spread) to other areas of the body, particularly the bones and lymph nodes. There, tumors cause severe bone pain, leg weakness or paralysis, and eventually death. Prostate cancer prognosis depends on how far the cancer has spread at diagnosis. Most men diagnosed have tumors confined to the prostate; 99% of them survive more than 10 years from their diagnoses. Tumors that have metastasized to distant body sites are most dangerous, with five-year survival rates of 30–40%. (Full article...)


    Diagram of prostate tumor pressing on urethra

    Prostate cancer is the uncontrolled growth of cells in the prostate, a gland in the male reproductive system below the bladder. Abnormal growth of prostate tissue is usually detected through screening tests, typically blood tests that check for prostate-specific antigen (PSA) levels. Those with high levels of PSA in their blood are at increased risk for developing prostate cancer. Diagnosis requires a biopsy of the prostate. If cancer is present, the pathologist assigns a Gleason score, and a higher score represents a more dangerous tumor. Medical imaging is performed to look for cancer that has spread outside the prostate. Based on the Gleason score, PSA levels, and imaging results, a cancer case is assigned a stage 1 to 4. A higher stage signifies a more advanced, more dangerous disease.

    Most prostate tumors remain small and cause no health problems. These are managed with active surveillance, monitoring the tumor with regular tests to ensure it has not grown. Tumors more likely to be dangerous can be destroyed with radiation therapy or surgically removed by radical prostatectomy. Those whose cancer spreads beyond the prostate are treated with hormone therapy which reduces levels of the androgens (male sex hormones) that prostate cells need to survive. Eventually cancer cells can grow resistant to this treatment. This most-advanced stage of the disease, called castration-resistant prostate cancer, is treated with continued hormone therapy alongside the chemotherapy drug docetaxel. Some tumors metastasize (spread) to other areas of the body, particularly the bones and lymph nodes. There, tumors cause severe bone pain, leg weakness or paralysis, and eventually death. Prostate cancer prognosis depends on how far the cancer has spread at diagnosis. Most men diagnosed have tumors confined to the prostate; 99% of them survive more than 10 years from their diagnoses. Tumors that have metastasized to distant body sites are most dangerous, with five-year survival rates of 30–40%. (Full article...)
  • Image 7 Testing for ketone bodies in urine The ketogenic diet is a high-fat, adequate-protein, low-carbohydrate dietary therapy that in conventional medicine is used mainly to treat hard-to-control (refractory) epilepsy in children. The diet forces the body to burn fats rather than carbohydrates. Normally, carbohydrates in food are converted into glucose, which is then transported around the body and is important in fueling brain function. However, if only a little carbohydrate remains in the diet, the liver converts fat into fatty acids and ketone bodies, the latter passing into the brain and replacing glucose as an energy source. An elevated level of ketone bodies in the blood (a state called ketosis) eventually lowers the frequency of epileptic seizures. Around half of children and young people with epilepsy who have tried some form of this diet saw the number of seizures drop by at least half, and the effect persists after discontinuing the diet. Some evidence shows that adults with epilepsy may benefit from the diet and that a less strict regimen, such as a modified Atkins diet, is similarly effective. Side effects may include constipation, high cholesterol, growth slowing, acidosis, and kidney stones. (Full article...)

    A test strip is compared with a colour chart that indicates the degree of ketonuria.
    Testing for ketone bodies in urine


    The ketogenic diet is a high-fat, adequate-protein, low-carbohydrate dietary therapy that in conventional medicine is used mainly to treat hard-to-control (refractory) epilepsy in children. The diet forces the body to burn fats rather than carbohydrates.

    Normally, carbohydrates in food are converted into glucose, which is then transported around the body and is important in fueling brain function. However, if only a little carbohydrate remains in the diet, the liver converts fat into fatty acids and ketone bodies, the latter passing into the brain and replacing glucose as an energy source. An elevated level of ketone bodies in the blood (a state called ketosis) eventually lowers the frequency of epileptic seizures. Around half of children and young people with epilepsy who have tried some form of this diet saw the number of seizures drop by at least half, and the effect persists after discontinuing the diet. Some evidence shows that adults with epilepsy may benefit from the diet and that a less strict regimen, such as a modified Atkins diet, is similarly effective. Side effects may include constipation, high cholesterol, growth slowing, acidosis, and kidney stones. (Full article...)

  • Image 8 Thyrotoxic periodic paralysis occurs when the thyroid gland releases excessive amounts of thyroxine (thyroid hormone). Thyrotoxic periodic paralysis (TPP) is a rare condition featuring attacks of muscle weakness in the presence of hyperthyroidism (overactivity of the thyroid gland). Hypokalemia (a decreased potassium level in the blood) is usually present during attacks. The condition may be life-threatening if weakness of the breathing muscles leads to respiratory failure, or if the low potassium levels lead to abnormal heart rhythms. If untreated, it is typically recurrent in nature. The condition has been linked with genetic mutations in genes that code for certain ion channels that transport electrolytes (sodium and potassium) across cell membranes. The main ones are the L-type calcium channel α1-subunit and potassium inward rectifier 2.6; it is therefore classified as a channelopathy. The abnormality in the channel is thought to lead to shifts of potassium into cells, under conditions of high thyroxine (thyroid hormone) levels, usually with an additional precipitant. (Full article...)


    Thyrotoxic periodic paralysis occurs when the thyroid gland releases excessive amounts of thyroxine (thyroid hormone).

    Thyrotoxic periodic paralysis (TPP) is a rare condition featuring attacks of muscle weakness in the presence of hyperthyroidism (overactivity of the thyroid gland). Hypokalemia (a decreased potassium level in the blood) is usually present during attacks. The condition may be life-threatening if weakness of the breathing muscles leads to respiratory failure, or if the low potassium levels lead to abnormal heart rhythms. If untreated, it is typically recurrent in nature.

    The condition has been linked with genetic mutations in genes that code for certain ion channels that transport electrolytes (sodium and potassium) across cell membranes. The main ones are the L-type calcium channel α1-subunit and potassium inward rectifier 2.6; it is therefore classified as a channelopathy. The abnormality in the channel is thought to lead to shifts of potassium into cells, under conditions of high thyroxine (thyroid hormone) levels, usually with an additional precipitant. (Full article...)
  • Image 9 Liver histology is altered in HRS while kidney histology is normal. The upper image is a trichrome stain (chicken wire appearance) cirrhosis of the liver, the most common cause of HRS. The lower image is a PAS stain of normal kidney histology. Hepatorenal syndrome (often abbreviated HRS) is a life-threatening medical condition that consists of rapid deterioration in kidney function in individuals with cirrhosis or fulminant liver failure. HRS is usually fatal unless a liver transplant is performed, although various treatments, such as dialysis, can prevent advancement of the condition. HRS can affect individuals with cirrhosis, severe alcoholic hepatitis, or liver failure, and usually occurs when liver function deteriorates rapidly because of a sudden insult such as an infection, bleeding in the gastrointestinal tract, or overuse of diuretic medications. HRS is a relatively common complication of cirrhosis, occurring in 18% of people within one year of their diagnosis, and in 39% within five years of their diagnosis. Deteriorating liver function is believed to cause changes in the circulation that supplies the intestines, altering blood flow and blood vessel tone in the kidneys. The kidney failure of HRS is a consequence of these changes in blood flow, rather than direct damage to the kidney. The diagnosis of hepatorenal syndrome is based on laboratory tests of individuals susceptible to the condition. Two forms of hepatorenal syndrome have been defined: Type 1 HRS entails a rapidly progressive decline in kidney function, while type 2 HRS is associated with ascites (fluid accumulation in the abdomen) that does not improve with standard diuretic medications. (Full article...)


    Photomicrograph of liver section stained in red, blue, and purple. Large amounts of fibrosis, stained blue, surround the red stained nodules.

    Liver histology is altered in HRS while kidney histology is normal. The upper image is a trichrome stain (chicken wire appearance) cirrhosis of the liver, the most common cause of HRS. The lower image is a PAS stain of normal kidney histology.

    Hepatorenal syndrome (often abbreviated HRS) is a life-threatening medical condition that consists of rapid deterioration in kidney function in individuals with cirrhosisorfulminant liver failure. HRS is usually fatal unless a liver transplant is performed, although various treatments, such as dialysis, can prevent advancement of the condition.

    HRS can affect individuals with cirrhosis, severe alcoholic hepatitis, or liver failure, and usually occurs when liver function deteriorates rapidly because of a sudden insult such as an infection, bleeding in the gastrointestinal tract, or overuse of diuretic medications. HRS is a relatively common complication of cirrhosis, occurring in 18% of people within one year of their diagnosis, and in 39% within five years of their diagnosis. Deteriorating liver function is believed to cause changes in the circulation that supplies the intestines, altering blood flow and blood vessel tone in the kidneys. The kidney failure of HRS is a consequence of these changes in blood flow, rather than direct damage to the kidney. The diagnosis of hepatorenal syndrome is based on laboratory tests of individuals susceptible to the condition. Two forms of hepatorenal syndrome have been defined: Type 1 HRS entails a rapidly progressive decline in kidney function, while type 2 HRS is associated with ascites (fluid accumulation in the abdomen) that does not improve with standard diuretic medications. (Full article...)
  • Image 10 Amphetamine (contracted from alpha-methylphenethylamine) is a central nervous system (CNS) stimulant that is used in the treatment of attention deficit hyperactivity disorder (ADHD), narcolepsy, and obesity. Amphetamine was discovered as a chemical in 1887 by Lazăr Edeleanu, and then as a drug in the late 1920s. It exists as two enantiomers: levoamphetamine and dextroamphetamine. Amphetamine properly refers to a specific chemical, the racemic free base, which is equal parts of the two enantiomers in their pure amine forms. The term is frequently used informally to refer to any combination of the enantiomers, or to either of them alone. Historically, it has been used to treat nasal congestion and depression. Amphetamine is also used as an athletic performance enhancer and cognitive enhancer, and recreationally as an aphrodisiac and euphoriant. It is a prescription drug in many countries, and unauthorized possession and distribution of amphetamine are often tightly controlled due to the significant health risks associated with recreational use. The first amphetamine pharmaceutical was Benzedrine, a brand which was used to treat a variety of conditions. Currently, pharmaceutical amphetamine is prescribed as racemic amphetamine, Adderall, dextroamphetamine, or the inactive prodrug lisdexamfetamine. Amphetamine increases monoamine and excitatory neurotransmission in the brain, with its most pronounced effects targeting the norepinephrine and dopamine neurotransmitter systems. (Full article...)


    Amphetamine (contracted from alpha-methylphenethylamine) is a central nervous system (CNS) stimulant that is used in the treatment of attention deficit hyperactivity disorder (ADHD), narcolepsy, and obesity. Amphetamine was discovered as a chemical in 1887 by Lazăr Edeleanu, and then as a drug in the late 1920s. It exists as two enantiomers: levoamphetamine and dextroamphetamine. Amphetamine properly refers to a specific chemical, the racemic free base, which is equal parts of the two enantiomers in their pure amine forms. The term is frequently used informally to refer to any combination of the enantiomers, or to either of them alone. Historically, it has been used to treat nasal congestion and depression. Amphetamine is also used as an athletic performance enhancer and cognitive enhancer, and recreationally as an aphrodisiac and euphoriant. It is a prescription drug in many countries, and unauthorized possession and distribution of amphetamine are often tightly controlled due to the significant health risks associated with recreational use.

    The first amphetamine pharmaceutical was Benzedrine, a brand which was used to treat a variety of conditions. Currently, pharmaceutical amphetamine is prescribed as racemic amphetamine, Adderall, dextroamphetamine, or the inactive prodrug lisdexamfetamine. Amphetamine increases monoamine and excitatory neurotransmission in the brain, with its most pronounced effects targeting the norepinephrine and dopamine neurotransmitter systems. (Full article...)

  • Image 11 White in 1989 Ryan Wayne White (December 6, 1971 – April 8, 1990) was an American teenager from Kokomo, Indiana, who became a national poster child for HIV/AIDS in the United States after his school barred him from attending classes following a diagnosis of AIDS. As a haemophiliac, he became infected with HIV from a contaminated factor VIII blood treatment and, when diagnosed in December 1984, was given six months to live. Doctors said he posed no risk to other students, as AIDS is not an airborne disease and spreads solely through bodily fluids, but AIDS was poorly understood by the general public at the time. When White tried to return to school, many parents and teachers in Howard County rallied against his attendance due to unwarranted concerns of the disease spreading to other students and staff. A lengthy administrative appeal process ensued, and news of the conflict turned White into a popular celebrity and advocate for AIDS research and public education. Surprising his doctors, White lived five years longer than predicted. He died on April 8, 1990, one month before his high school graduation. (Full article...)


    White in 1989

    Ryan Wayne White (December 6, 1971 – April 8, 1990) was an American teenager from Kokomo, Indiana, who became a national poster child for HIV/AIDS in the United States after his school barred him from attending classes following a diagnosis of AIDS.

    As a haemophiliac, he became infected with HIV from a contaminated factor VIII blood treatment and, when diagnosed in December 1984, was given six months to live. Doctors said he posed no risk to other students, as AIDS is not an airborne disease and spreads solely through bodily fluids, but AIDS was poorly understood by the general public at the time. When White tried to return to school, many parents and teachers in Howard County rallied against his attendance due to unwarranted concerns of the disease spreading to other students and staff. A lengthy administrative appeal process ensued, and news of the conflict turned White into a popular celebrity and advocate for AIDS research and public education. Surprising his doctors, White lived five years longer than predicted. He died on April 8, 1990, one month before his high school graduation. (Full article...)
  • Image 12 Young people with polio receiving physiotherapy in the 1950s The social history of viruses describes the influence of viruses and viral infections on human history. Epidemics caused by viruses began when human behaviour changed during the Neolithic period, around 12,000 years ago, when humans developed more densely populated agricultural communities. This allowed viruses to spread rapidly and subsequently to become endemic. Viruses of plants and livestock also increased, and as humans became dependent on agriculture and farming, diseases such as potyviruses of potatoes and rinderpest of cattle had devastating consequences. Smallpox and measles viruses are among the oldest that infect humans. Having evolved from viruses that infected other animals, they first appeared in humans in Europe and North Africa thousands of years ago. The viruses were later carried to the New World by Europeans during the time of the Spanish Conquests, but the indigenous people had no natural resistance to the viruses and millions of them died during epidemics. Influenza pandemics have been recorded since 1580, and they have occurred with increasing frequency in subsequent centuries. The pandemic of 1918–19, in which 40–50 million died in less than a year, was one of the most devastating in history. (Full article...)

    Young people with polio receiving physiotherapy in the 1950s

    The social history of viruses describes the influence of viruses and viral infections on human history. Epidemics caused by viruses began when human behaviour changed during the Neolithic period, around 12,000 years ago, when humans developed more densely populated agricultural communities. This allowed viruses to spread rapidly and subsequently to become endemic. Viruses of plants and livestock also increased, and as humans became dependent on agriculture and farming, diseases such as potyviruses of potatoes and rinderpest of cattle had devastating consequences.

    Smallpox and measles viruses are among the oldest that infect humans. Having evolved from viruses that infected other animals, they first appeared in humans in Europe and North Africa thousands of years ago. The viruses were later carried to the New World by Europeans during the time of the Spanish Conquests, but the indigenous people had no natural resistance to the viruses and millions of them died during epidemics. Influenza pandemics have been recorded since 1580, and they have occurred with increasing frequency in subsequent centuries. The pandemic of 1918–19, in which 40–50 million died in less than a year, was one of the most devastating in history. (Full article...)

  • Image 13 A serpin (white) with its 'reactive centre loop' (blue) bound to a protease (grey). Once the protease attempts catalysis it will be irreversibly inhibited. (PDB: 1K9O​) Serpins are a superfamily of proteins with similar structures that were first identified for their protease inhibition activity and are found in all kingdoms of life. The acronym serpin was originally coined because the first serpins to be identified act on chymotrypsin-like serine proteases (serine protease inhibitors). They are notable for their unusual mechanism of action, in which they irreversibly inhibit their target protease by undergoing a large conformational change to disrupt the target's active site. This contrasts with the more common competitive mechanism for protease inhibitors that bind to and block access to the protease active site. Protease inhibition by serpins controls an array of biological processes, including coagulation and inflammation, and consequently these proteins are the target of medical research. Their unique conformational change also makes them of interest to the structural biology and protein folding research communities. The conformational-change mechanism confers certain advantages, but it also has drawbacks: serpins are vulnerable to mutations that can result in serpinopathies such as protein misfolding and the formation of inactive long-chain polymers. Serpin polymerisation not only reduces the amount of active inhibitor, but also leads to accumulation of the polymers, causing cell death and organ failure. (Full article...)


    A serpin (white) with its 'reactive centre loop' (blue) bound to a protease (grey). Once the protease attempts catalysis it will be irreversibly inhibited. (PDB: 1K9O​)

    Serpins are a superfamilyofproteins with similar structures that were first identified for their protease inhibition activity and are found in all kingdoms of life. The acronym serpin was originally coined because the first serpins to be identified act on chymotrypsin-like serine proteases (serine protease inhibitors). They are notable for their unusual mechanism of action, in which they irreversibly inhibit their target protease by undergoing a large conformational change to disrupt the target's active site. This contrasts with the more common competitive mechanism for protease inhibitors that bind to and block access to the protease active site.

    Protease inhibition by serpins controls an array of biological processes, including coagulation and inflammation, and consequently these proteins are the target of medical research. Their unique conformational change also makes them of interest to the structural biology and protein folding research communities. The conformational-change mechanism confers certain advantages, but it also has drawbacks: serpins are vulnerable to mutations that can result in serpinopathies such as protein misfolding and the formation of inactive long-chain polymers. Serpin polymerisation not only reduces the amount of active inhibitor, but also leads to accumulation of the polymers, causing cell death and organ failure. (Full article...)
  • Image 14 Four of the restaurants in The Dalles affected by the attack In 1984, 751 people suffered food poisoning in The Dalles, Oregon, United States, due to the deliberate contamination of salad bars at ten local restaurants with Salmonella. A group of prominent followers of Rajneesh (later known as Osho) led by Ma Anand Sheela had hoped to incapacitate the voting population of the city so that their own candidates would win the 1984 Wasco County elections. The incident was the first and is still the single largest bioterrorist attack in U.S. history. Rajneesh's followers had previously gained political control of Antelope, Oregon, as they were based in the nearby intentional community of Rajneeshpuram, and they now sought election to two of the three seats on the Wasco County Circuit Court that were up for election in November 1984. Some Rajneeshpuram officials feared that they would not get enough votes, so they decided to incapacitate voters in The Dalles, the largest population center in Wasco County. The chosen biological agent was Salmonella enterica Typhimurium, which was first delivered through glasses of water to two county commissioners and then at salad bars and in salad dressing. (Full article...)


    Four of the restaurants in The Dalles affected by the attack

    In 1984, 751 people suffered food poisoning in The Dalles, Oregon, United States, due to the deliberate contamination of salad bars at ten local restaurants with Salmonella. A group of prominent followers of Rajneesh (later known as Osho) led by Ma Anand Sheela had hoped to incapacitate the voting population of the city so that their own candidates would win the 1984 Wasco County elections. The incident was the first and is still the single largest bioterrorist attack in U.S. history.

    Rajneesh's followers had previously gained political control of Antelope, Oregon, as they were based in the nearby intentional communityofRajneeshpuram, and they now sought election to two of the three seats on the Wasco County Circuit Court that were up for election in November 1984. Some Rajneeshpuram officials feared that they would not get enough votes, so they decided to incapacitate voters in The Dalles, the largest population center in Wasco County. The chosen biological agent was Salmonella enterica Typhimurium, which was first delivered through glasses of water to two county commissioners and then at salad bars and in salad dressing. (Full article...)
  • Image 15 Computer–aided reconstruction of a rotavirus based on several electron micrographs Rotaviruses are the most common cause of diarrhoeal disease among infants and young children. Nearly every child in the world is infected with a rotavirus at least once by the age of five. Immunity develops with each infection, so subsequent infections are less severe. Adults are rarely affected. Rotavirus is a genus of double-stranded RNA viruses in the family Reoviridae. There are nine species of the genus, referred to as A, B, C, D, F, G, H, I and J. Rotavirus A is the most common species, and these rotaviruses cause more than 90% of rotavirus infections in humans. The virus is transmitted by the faecal–oral route. It infects and damages the cells that line the small intestine and causes gastroenteritis (which is often called "stomach flu" despite having no relation to influenza). Although rotavirus was discovered in 1973 by Ruth Bishop and her colleagues by electron micrograph images and accounts for approximately one third of hospitalisations for severe diarrhoea in infants and children, its importance has historically been underestimated within the public health community, particularly in developing countries. In addition to its impact on human health, rotavirus also infects other animals, and is a pathogen of livestock. (Full article...)


    Computer–aided reconstruction of a rotavirus based on several electron micrographs

    Rotaviruses are the most common cause of diarrhoeal disease among infants and young children. Nearly every child in the world is infected with a rotavirus at least once by the age of five. Immunity develops with each infection, so subsequent infections are less severe. Adults are rarely affected. Rotavirus is a genusofdouble-stranded RNA viruses in the family Reoviridae. There are nine species of the genus, referred to as A, B, C, D, F, G, H, I and J. Rotavirus A is the most common species, and these rotaviruses cause more than 90% of rotavirus infections in humans.

    The virus is transmitted by the faecal–oral route. It infects and damages the cells that line the small intestine and causes gastroenteritis (which is often called "stomach flu" despite having no relation to influenza). Although rotavirus was discovered in 1973 by Ruth Bishop and her colleagues by electron micrograph images and accounts for approximately one third of hospitalisations for severe diarrhoea in infants and children, its importance has historically been underestimated within the public health community, particularly in developing countries. In addition to its impact on human health, rotavirus also infects other animals, and is a pathogen of livestock. (Full article...)
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    Riboflavin, also known as vitamin B2, is a vitamin found in food and sold as a dietary supplement. It is essential to the formation of two major coenzymes, flavin mononucleotide and flavin adenine dinucleotide. These coenzymes are involved in energy metabolism, cellular respiration, and antibody production, as well as normal growth and development. The coenzymes are also required for the metabolism of niacin, vitamin B6, and folate. Riboflavin is prescribed to treat corneal thinning, and taken orally, may reduce the incidence of migraine headaches in adults.

    Riboflavin deficiency is rare and is usually accompanied by deficiencies of other vitamins and nutrients. It may be prevented or treated by oral supplements or by injections. As a water-soluble vitamin, any riboflavin consumed in excess of nutritional requirements is not stored; it is either not absorbed or is absorbed and quickly excreted in urine, causing the urine to have a bright yellow tint. Natural sources of riboflavin include meat, fish and fowl, eggs, dairy products, green vegetables, mushrooms, and almonds. Some countries require its addition to grains. (Full article...)

  • Image 2 A kidney stone, 8 millimeters (0.3 in) in diameter Kidney stone disease, also known as renal calculus disease, nephrolithiasis or urolithiasis, is a crystallopathy where a solid piece of material (renal calculus) develops in the urinary tract. Renal calculi typically form in the kidney and leave the body in the urine stream. A small calculus may pass without causing symptoms. If a stone grows to more than 5 millimeters (0.2 inches), it can cause blockage of the ureter, resulting in sharp and severe pain in the lower back that often radiates downward to the groin (renal colic). A calculus may also result in blood in the urine, vomiting, or painful urination. About half of people who have had a renal calculus are likely to have another within ten years. Most calculi form by a combination of genetics and environmental factors. Risk factors include high urine calcium levels, obesity, certain foods, some medications, calcium supplements, hyperparathyroidism, gout and not drinking enough fluids. Calculi form in the kidney when minerals in urine are at high concentration. The diagnosis is usually based on symptoms, urine testing, and medical imaging. Blood tests may also be useful. Calculi are typically classified by their location: nephrolithiasis (in the kidney), ureterolithiasis (in the ureter), cystolithiasis (in the bladder), or by what they are made of (calcium oxalate, uric acid, struvite, cystine). (Full article...)


    A kidney stone, 8 millimeters (0.3 in) in diameter

    Kidney stone disease, also known as renal calculus disease, nephrolithiasisorurolithiasis, is a crystallopathy where a solid piece of material (renal calculus) develops in the urinary tract. Renal calculi typically form in the kidney and leave the body in the urine stream. A small calculus may pass without causing symptoms. If a stone grows to more than 5 millimeters (0.2 inches), it can cause blockage of the ureter, resulting in sharp and severe pain in the lower back that often radiates downward to the groin (renal colic). A calculus may also result in blood in the urine, vomiting, or painful urination. About half of people who have had a renal calculus are likely to have another within ten years.


    Most calculi form by a combination of genetics and environmental factors. Risk factors include high urine calcium levels, obesity, certain foods, some medications, calcium supplements, hyperparathyroidism, gout and not drinking enough fluids. Calculi form in the kidney when mineralsinurine are at high concentration. The diagnosis is usually based on symptoms, urine testing, and medical imaging. Blood tests may also be useful. Calculi are typically classified by their location: nephrolithiasis (in the kidney), ureterolithiasis (in the ureter), cystolithiasis (in the bladder), or by what they are made of (calcium oxalate, uric acid, struvite, cystine). (Full article...)
  • Image 3 Playa de Oro virus (OROV) is a probable species of orthohantavirus found in the rodents Oryzomys couesi and Sigmodon mascotensis in the Mexican state of Colima. The former is thought to be the main host. The sequences of parts of the virus's RNA-based genome have been determined; they differ by 7–10% in amino acid composition and 22–24% in nucleotide composition from closely related viruses. Playa de Oro virus was identified as a new species in 2008 and is most closely related to Bayou virus, Catacamas virus, Muleshoe virus, and Black Creek Canal virus, found in other species of Oryzomys and Sigmodon. Catacamas virus is found in a different population of Oryzomys couesi, and the presence of different viruses in these two species has been used as an argument for classifying the two populations of the host as separate species. (Full article...)

    Playa de Oro virus (OROV) is a probable species of orthohantavirus found in the rodents Oryzomys couesi and Sigmodon mascotensis in the Mexican state of Colima. The former is thought to be the main host. The sequences of parts of the virus's RNA-based genome have been determined; they differ by 7–10% in amino acid composition and 22–24% in nucleotide composition from closely related viruses.

    Playa de Oro virus was identified as a new species in 2008 and is most closely related to Bayou virus, Catacamas virus, Muleshoe virus, and Black Creek Canal virus, found in other species of Oryzomys and Sigmodon. Catacamas virus is found in a different population of Oryzomys couesi, and the presence of different viruses in these two species has been used as an argument for classifying the two populations of the host as separate species. (Full article...)

  • Image 4 3D CT of an impacted wisdom tooth adjacent the inferior alveolar nerve prior to removal of wisdom tooth Impacted wisdom teeth is a condition where the third molars (wisdom teeth) are prevented from erupting into the mouth. This can be caused by a physical barrier, such as other teeth, or when the tooth is angled away from a vertical position. Completely unerupted wisdom teeth usually result in no symptoms, although they can sometimes develop cysts or neoplasms. Partially erupted wisdom teeth or wisdom teeth that are not erupted but are exposed to oral bacteria through deep periodontal pocket, can develop cavities or pericoronitis. Removal of impacted wisdom teeth is advised for the future prevention of or in the current presence of certain pathologies, such as caries (dental decay), periodontal disease or cysts. Prophylactic (preventative) extraction of wisdom teeth is preferred to be done at a younger age (middle to late teenage years) to take advantage of incomplete root development, which is associated with an easier surgical procedure and less probability of complications. Impacted wisdom teeth are classified by their direction of impaction, their depth compared to the biting surface of adjacent teeth and the amount of the tooth's crown that extends through gum tissue or bone. Impacted wisdom teeth can also be classified by the presence or absence of symptoms and disease. Screening for the presence of wisdom teeth often begins in late adolescence when a partially developed tooth may become impacted. Screening commonly includes a clinical examination as well as x-rays such as panoramic radiographs. (Full article...)


    3D CT of an impacted wisdom tooth adjacent the inferior alveolar nerve prior to removal of wisdom tooth

    Impacted wisdom teeth is a condition where the third molars (wisdom teeth) are prevented from erupting into the mouth. This can be caused by a physical barrier, such as other teeth, or when the tooth is angled away from a vertical position. Completely unerupted wisdom teeth usually result in no symptoms, although they can sometimes develop cystsorneoplasms. Partially erupted wisdom teeth or wisdom teeth that are not erupted but are exposed to oral bacteria through deep periodontal pocket, can develop cavitiesorpericoronitis. Removal of impacted wisdom teeth is advised for the future prevention of or in the current presence of certain pathologies, such as caries (dental decay), periodontal disease or cysts. Prophylactic (preventative) extraction of wisdom teeth is preferred to be done at a younger age (middle to late teenage years) to take advantage of incomplete root development, which is associated with an easier surgical procedure and less probability of complications.


    Impacted wisdom teeth are classified by their direction of impaction, their depth compared to the biting surface of adjacent teeth and the amount of the tooth's crown that extends through gum tissue or bone. Impacted wisdom teeth can also be classified by the presence or absence of symptoms and disease. Screening for the presence of wisdom teeth often begins in late adolescence when a partially developed tooth may become impacted. Screening commonly includes a clinical examination as well as x-rays such as panoramic radiographs. (Full article...)
  • Image 5 Diagram demonstrating the anatomy of both internal and external hemorrhoids Hemorrhoids (or haemorrhoids), also known as piles, are vascular structures in the anal canal. In their normal state, they are cushions that help with stool control. They become a disease when swollen or inflamed; the unqualified term hemorrhoid is often used to refer to the disease. The signs and symptoms of hemorrhoids depend on the type present. Internal hemorrhoids often result in painless, bright red rectal bleeding when defecating. External hemorrhoids often result in pain and swelling in the area of the anus. If bleeding occurs, it is usually darker. Symptoms frequently get better after a few days. A skin tag may remain after the healing of an external hemorrhoid. While the exact cause of hemorrhoids remains unknown, a number of factors that increase pressure in the abdomen are believed to be involved. This may include constipation, diarrhea, and sitting on the toilet for long periods. Hemorrhoids are also more common during pregnancy. Diagnosis is made by looking at the area. Many people incorrectly refer to any symptom occurring around the anal area as hemorrhoids, and serious causes of the symptoms should not be ruled out. Colonoscopy or sigmoidoscopy is reasonable to confirm the diagnosis and rule out more serious causes. (Full article...)


    Diagram demonstrating the anatomy of both internal and external hemorrhoids

    Hemorrhoids (orhaemorrhoids), also known as piles, are vascular structures in the anal canal. In their normal state, they are cushions that help with stool control. They become a disease when swollenorinflamed; the unqualified term hemorrhoid is often used to refer to the disease. The signs and symptoms of hemorrhoids depend on the type present. Internal hemorrhoids often result in painless, bright red rectal bleeding when defecating. External hemorrhoids often result in pain and swelling in the area of the anus. If bleeding occurs, it is usually darker. Symptoms frequently get better after a few days. A skin tag may remain after the healing of an external hemorrhoid.


    While the exact cause of hemorrhoids remains unknown, a number of factors that increase pressure in the abdomen are believed to be involved. This may include constipation, diarrhea, and sitting on the toilet for long periods. Hemorrhoids are also more common during pregnancy. Diagnosis is made by looking at the area. Many people incorrectly refer to any symptom occurring around the anal area as hemorrhoids, and serious causes of the symptoms should not be ruled out. Colonoscopyorsigmoidoscopy is reasonable to confirm the diagnosis and rule out more serious causes. (Full article...)
  • Image 6 Chest X-ray of a person with advanced tuberculosis: Infection in both lungs is marked by white arrow-heads, and the formation of a cavity is marked by black arrows. Tuberculosis (TB), also known colloquially as the "white death", or historically as consumption, is an infectious disease usually caused by Mycobacterium tuberculosis (MTB) bacteria. Tuberculosis generally affects the lungs, but it can also affect other parts of the body. Most infections show no symptoms, in which case it is known as latent tuberculosis. Around 10% of latent infections progress to active disease which, if left untreated, kill about half of those affected. Typical symptoms of active TB are chronic cough with blood-containing mucus, fever, night sweats, and weight loss. Infection of other organs can cause a wide range of symptoms. Tuberculosis is spread from one person to the next through the air when people who have active TB in their lungs cough, spit, speak, or sneeze. People with latent TB do not spread the disease. Active infection occurs more often in people with HIV/AIDS and in those who smoke. Diagnosis of active TB is based on chest X-rays, as well as microscopic examination and culture of body fluids. Diagnosis of latent TB relies on the tuberculin skin test (TST) or blood tests. (Full article...)


    Chest X-ray of a person with advanced tuberculosis: Infection in both lungs is marked by white arrow-heads, and the formation of a cavity is marked by black arrows.

    Tuberculosis (TB), also known colloquially as the "white death", or historically as consumption, is an infectious disease usually caused by Mycobacterium tuberculosis (MTB) bacteria. Tuberculosis generally affects the lungs, but it can also affect other parts of the body. Most infections show no symptoms, in which case it is known as latent tuberculosis. Around 10% of latent infections progress to active disease which, if left untreated, kill about half of those affected. Typical symptoms of active TB are chronic cough with blood-containing mucus, fever, night sweats, and weight loss. Infection of other organs can cause a wide range of symptoms.

    Tuberculosis is spread from one person to the next through the air when people who have active TB in their lungs cough, spit, speak, or sneeze. People with latent TB do not spread the disease. Active infection occurs more often in people with HIV/AIDS and in those who smoke. Diagnosis of active TB is based on chest X-rays, as well as microscopic examination and culture of body fluids. Diagnosis of latent TB relies on the tuberculin skin test (TST) or blood tests. (Full article...)
  • Image 7 Nasodigitoacoustic syndrome, also called Keipert syndrome, is a rare congenital syndrome first described by J.A. Keipert and colleagues in 1973. The syndrome is characterized by a misshaped nose, broad thumbs and halluces (the big toes), brachydactyly, sensorineural hearing loss, facial features such as hypertelorism (unusually wide-set eyes), and developmental delay. It is believed to be inherited in an X-linked recessive manner, which means a genetic mutation causing the disorder is located on the X chromosome, and while two copies of the mutated gene must be inherited for a female to be born with the disorder, just one copy is sufficient to cause a male to be born with the disorder. Nasodigitoacoustic syndrome is likely caused by a mutated gene located on the X chromosome between positions Xq22.2–q28. (Full article...)

    Nasodigitoacoustic syndrome, also called Keipert syndrome, is a rare congenital syndrome first described by J.A. Keipert and colleagues in 1973. The syndrome is characterized by a misshaped nose, broad thumbs and halluces (the big toes), brachydactyly, sensorineural hearing loss, facial features such as hypertelorism (unusually wide-set eyes), and developmental delay.

    It is believed to be inherited in an X-linked recessive manner, which means a genetic mutation causing the disorder is located on the X chromosome, and while two copies of the mutated gene must be inherited for a female to be born with the disorder, just one copy is sufficient to cause a male to be born with the disorder. Nasodigitoacoustic syndrome is likely caused by a mutated gene located on the X chromosome between positions Xq22.2–q28. (Full article...)

  • Image 8 March 2020 message to the English Wikipedia's readers about COVID-19, written by Katherine Maher, then-executive director of the Wikimedia Foundation The COVID-19 pandemic was covered in Wikipedia extensively, in real-time, and across multiple languages. This coverage extends to many detailed articles about various aspects of the topic itself, as well as many existing articles being amended to take account of the pandemic's effect on them. Wikipedia and other Wikimedia projects' coverage of the pandemic – and how the volunteer editing community achieved that coverage – received widespread media attention for its comprehensiveness, reliability, and speed. Wikipedia experienced an increase in readership during the pandemic. (Full article...)

    Pop-up message at the top of a Wikipedia page
    March 2020 message to the English Wikipedia's readers about COVID-19, written by Katherine Maher, then-executive director of the Wikimedia Foundation


    The COVID-19 pandemic was covered in Wikipedia extensively, in real-time, and across multiple languages. This coverage extends to many detailed articles about various aspects of the topic itself, as well as many existing articles being amended to take account of the pandemic's effect on them. Wikipedia and other Wikimedia projects' coverage of the pandemic – and how the volunteer editing community achieved that coverage – received widespread media attention for its comprehensiveness, reliability, and speed. Wikipedia experienced an increase in readership during the pandemic. (Full article...)

  • Image 9 Jean Frances Tatlock (February 21, 1914 – January 4, 1944) was an American psychiatrist. She was a member of the Communist Party USA and was a reporter and writer for the party's publication Western Worker. She is also known for her romantic relationship with J. Robert Oppenheimer, the director of the Manhattan Project's Los Alamos Laboratory during World War II. The daughter of John Strong Perry Tatlock, a prominent Old English philologist and an expert on Geoffrey Chaucer, Tatlock was a graduate of Vassar College and the Stanford Medical School, where she studied to become a psychiatrist. Tatlock began seeing Oppenheimer in 1936, when she was a graduate student at Stanford and Oppenheimer was a professor of physics at the University of California, Berkeley. As a result of their relationship and her membership of the Communist Party, she was placed under surveillance by the FBI and her phone was tapped. Tatlock experienced clinical depression, and committed suicide on January 4, 1944. (Full article...)

    Jean Frances Tatlock (February 21, 1914 – January 4, 1944) was an American psychiatrist. She was a member of the Communist Party USA and was a reporter and writer for the party's publication Western Worker. She is also known for her romantic relationship with J. Robert Oppenheimer, the director of the Manhattan Project's Los Alamos Laboratory during World War II.

    The daughter of John Strong Perry Tatlock, a prominent Old English philologist and an expert on Geoffrey Chaucer, Tatlock was a graduate of Vassar College and the Stanford Medical School, where she studied to become a psychiatrist. Tatlock began seeing Oppenheimer in 1936, when she was a graduate student at Stanford and Oppenheimer was a professor of physics at the University of California, Berkeley. As a result of their relationship and her membership of the Communist Party, she was placed under surveillance by the FBI and her phone was tapped. Tatlock experienced clinical depression, and committed suicide on January 4, 1944. (Full article...)

  • Image 10 Drawing showing the usual sites of infection in pelvic inflammatory disease Pelvic inflammatory disease, also known as pelvic inflammatory disorder (PID), is an infection of the upper part of the female reproductive system, namely the uterus, fallopian tubes, and ovaries, and inside of the pelvis. Often, there may be no symptoms. Signs and symptoms, when present, may include lower abdominal pain, vaginal discharge, fever, burning with urination, pain with sex, bleeding after sex, or irregular menstruation. Untreated PID can result in long-term complications including infertility, ectopic pregnancy, chronic pelvic pain, and cancer. The disease is caused by bacteria that spread from the vagina and cervix. While it has been reported that infections by Neisseria gonorrhoeae or Chlamydia trachomatis are present in 75 to 90 percent of cases, the strong association of PID with these infections is often a misconception. In the UK it is reported by the NHS that infections by Neisseria gonorrhoeae and Chlamydia trachomatis are responsible for only a quarter of PID cases. Often, multiple different bacteria are involved. (Full article...)


    Drawing showing the usual sites of infection in pelvic inflammatory disease

    Pelvic inflammatory disease, also known as pelvic inflammatory disorder (PID), is an infection of the upper part of the female reproductive system, namely the uterus, fallopian tubes, and ovaries, and inside of the pelvis. Often, there may be no symptoms. Signs and symptoms, when present, may include lower abdominal pain, vaginal discharge, fever, burning with urination, pain with sex, bleeding after sex, or irregular menstruation. Untreated PID can result in long-term complications including infertility, ectopic pregnancy, chronic pelvic pain, and cancer.


    The disease is caused by bacteria that spread from the vagina and cervix. While it has been reported that infections by Neisseria gonorrhoeaeorChlamydia trachomatis are present in 75 to 90 percent of cases, the strong association of PID with these infections is often a misconception. In the UK it is reported by the NHS that infections by Neisseria gonorrhoeae and Chlamydia trachomatis are responsible for only a quarter of PID cases. Often, multiple different bacteria are involved. (Full article...)
  • Image 11 Betsy Thung Sin Nio (Chinese: 汤新娘; pinyin: Tāng Xīnniáng, 22 May 1902 – 5 January 1996) was an Indonesian-Dutch women's rights activist, physician, economist and politician. Born into a wealthy and progressive Peranakan family of the 'Cabang Atas' gentry in Batavia, she was encouraged to obtain an education, which was unusual for Indonesian women at the time. After completing high school, she qualified as a bookkeeper, but – because social norms prevented women from doing office work – she became a teacher. After teaching briefly in an elementary school, in 1924 Thung enrolled at the Netherlands School of Business in Rotterdam to study economics. On graduating, she went on to earn a master's degree and a doctorate in economics. In 1932, she enrolled at the University of Amsterdam to pursue her medical studies. During her schooling in the Netherlands, Thung met Aletta Jacobs who encouraged her to become involved in the Dutch women's movement and the Association for Women's Interests and Equal Citizenship. She became an activist for improved socio-economic and civil status of women, writing articles for feminist journals in both the Netherlands and the Dutch East Indies. After completing her degree in 1938, Thung returned to Batavia and opened a medical practice focusing on the health needs of women and children. She continued her feminist involvement and fought for women's suffrage. When the government proposed only European women be given the vote and the right to stand in elections, she campaigned successfully to secure voting rights for educated women regardless of their race. (Full article...)

    Betsy Thung Sin Nio (Chinese: 汤新娘; pinyin: Tāng Xīnniáng, 22 May 1902 – 5 January 1996) was an Indonesian-Dutch women's rights activist, physician, economist and politician. Born into a wealthy and progressive Peranakan family of the 'Cabang Atas' gentry in Batavia, she was encouraged to obtain an education, which was unusual for Indonesian women at the time. After completing high school, she qualified as a bookkeeper, but – because social norms prevented women from doing office work – she became a teacher. After teaching briefly in an elementary school, in 1924 Thung enrolled at the Netherlands School of BusinessinRotterdam to study economics. On graduating, she went on to earn a master's degree and a doctorate in economics. In 1932, she enrolled at the University of Amsterdam to pursue her medical studies.

    During her schooling in the Netherlands, Thung met Aletta Jacobs who encouraged her to become involved in the Dutch women's movement and the Association for Women's Interests and Equal Citizenship. She became an activist for improved socio-economic and civil status of women, writing articles for feminist journals in both the Netherlands and the Dutch East Indies. After completing her degree in 1938, Thung returned to Batavia and opened a medical practice focusing on the health needs of women and children. She continued her feminist involvement and fought for women's suffrage. When the government proposed only European women be given the vote and the right to stand in elections, she campaigned successfully to secure voting rights for educated women regardless of their race. (Full article...)

  • Image 12 An illustration of a Manhattan plot depicting several strongly associated risk loci. Each dot represents a SNP, with the X-axis showing genomic location and Y-axis showing association level. This example is taken from a GWA study investigating kidney stone disease, so the peaks indicate genetic variants that are found more often in individuals with kidney stones. In genomics, a genome-wide association study (GWA study, or GWAS), is an observational study of a genome-wide set of genetic variants in different individuals to see if any variant is associated with a trait. GWA studies typically focus on associations between single-nucleotide polymorphisms (SNPs) and traits like major human diseases, but can equally be applied to any other genetic variants and any other organisms. When applied to human data, GWA studies compare the DNA of participants having varying phenotypes for a particular trait or disease. These participants may be people with a disease (cases) and similar people without the disease (controls), or they may be people with different phenotypes for a particular trait, for example blood pressure. This approach is known as phenotype-first, in which the participants are classified first by their clinical manifestation(s), as opposed to genotype-first. Each person gives a sample of DNA, from which millions of genetic variants are read using SNP arrays. If there is significant statistical evidence that one type of the variant (one allele) is more frequent in people with the disease, the variant is said to be associated with the disease. The associated SNPs are then considered to mark a region of the human genome that may influence the risk of disease. (Full article...)

    Manhattan plot of a GWAS
    An illustration of a Manhattan plot depicting several strongly associated risk loci. Each dot represents a SNP, with the X-axis showing genomic location and Y-axis showing association level. This example is taken from a GWA study investigating kidney stone disease, so the peaks indicate genetic variants that are found more often in individuals with kidney stones.


    Ingenomics, a genome-wide association study (GWA study, or GWAS), is an observational study of a genome-wide set of genetic variants in different individuals to see if any variant is associated with a trait. GWA studies typically focus on associations between single-nucleotide polymorphisms (SNPs) and traits like major human diseases, but can equally be applied to any other genetic variants and any other organisms.

    When applied to human data, GWA studies compare the DNA of participants having varying phenotypes for a particular trait or disease. These participants may be people with a disease (cases) and similar people without the disease (controls), or they may be people with different phenotypes for a particular trait, for example blood pressure. This approach is known as phenotype-first, in which the participants are classified first by their clinical manifestation(s), as opposed to genotype-first. Each person gives a sample of DNA, from which millions of genetic variants are read using SNP arrays. If there is significant statistical evidence that one type of the variant (one allele) is more frequent in people with the disease, the variant is said to be associated with the disease. The associated SNPs are then considered to mark a region of the human genome that may influence the risk of disease. (Full article...)

  • Image 13 Mary Louisa Gordon (15 August 1861 − 5 May 1941) was a British physician, prison inspector and writer. After graduating from the London School of Medicine for Women in 1890, Gordon worked at the East London Hospital for Children, the Evelina London Children's Hospital, and later had a private practice in Harley Street. While working as a physician, she made a number of public addresses and wrote publications on topics including the effects of prostitution and alcohol dependence on women. Gordon was appointed as the first British female prison inspector in 1908. During her time as prison inspector, she enacted a number of improvements including prison work allocation. She also supported the British suffragette movement, and secretly communicated with the Women's Social and Political Union about conditions in prisons. After retirement in 1921, she wrote the book Penal Discipline (1922), which advocated for reforms to the prison system, and the historical novel Chase of the Wild Goose (1936), based on the Ladies of Llangollen. (Full article...)

    Mary Louisa Gordon (15 August 1861 − 5 May 1941) was a British physician, prison inspector and writer. After graduating from the London School of Medicine for Women in 1890, Gordon worked at the East London Hospital for Children, the Evelina London Children's Hospital, and later had a private practice in Harley Street. While working as a physician, she made a number of public addresses and wrote publications on topics including the effects of prostitution and alcohol dependence on women.

    Gordon was appointed as the first British female prison inspector in 1908. During her time as prison inspector, she enacted a number of improvements including prison work allocation. She also supported the British suffragette movement, and secretly communicated with the Women's Social and Political Union about conditions in prisons. After retirement in 1921, she wrote the book Penal Discipline (1922), which advocated for reforms to the prison system, and the historical novel Chase of the Wild Goose (1936), based on the Ladies of Llangollen. (Full article...)

  • Image 14 Sir Ewan Forbes, 11th Baronet, MBChB (6 September 1912 – 12 September 1991), was a Scottish nobleman, general practitioner and farmer. Forbes was a trans man; he was christened Elizabeth Forbes-Sempill and officially registered as the youngest daughter of John, Lord Sempill. After an uncomfortable upbringing, he began presenting as a man in the 1930s, following a course of medical treatments in Germany. He formally re-registered his birth as male in 1952, changing his name to Ewan, and was married a month later. In 1965, he stood to inherit the baronetcy of his elder brother William, Lord Sempill, together with a large estate. This inheritance was challenged by his cousin, who argued that the re-registration was invalid; under this interpretation, Forbes would legally be considered a woman, and thus unable to inherit the baronetcy. The legal position was unclear, and it took three years before a ruling by the Court of Session, which held him to be intersex, finally led to the Home Secretary recognising his claim to the title. The case was heard in great secrecy, with the effect that it was unable to be considered in other judgments on the legal recognition of gender variance, but has become more widely known since his death in 1991. (Full article...)

    Sir Ewan Forbes, 11th Baronet, MBChB (6 September 1912 – 12 September 1991), was a Scottish nobleman, general practitioner and farmer. Forbes was a trans man; he was christened Elizabeth Forbes-Sempill and officially registered as the youngest daughter of John, Lord Sempill. After an uncomfortable upbringing, he began presenting as a man in the 1930s, following a course of medical treatments in Germany. He formally re-registered his birth as male in 1952, changing his name to Ewan, and was married a month later.

    In 1965, he stood to inherit the baronetcy of his elder brother William, Lord Sempill, together with a large estate. This inheritance was challenged by his cousin, who argued that the re-registration was invalid; under this interpretation, Forbes would legally be considered a woman, and thus unable to inherit the baronetcy. The legal position was unclear, and it took three years before a ruling by the Court of Session, which held him to be intersex, finally led to the Home Secretary recognising his claim to the title. The case was heard in great secrecy, with the effect that it was unable to be considered in other judgments on the legal recognition of gender variance, but has become more widely known since his death in 1991. (Full article...)

  • Image 15 The steeple sign as seen on an AP neck X-ray of a child with croup Croup, also known as laryngotracheobronchitis, is a type of respiratory infection that is usually caused by a virus. The infection leads to swelling inside the trachea, which interferes with normal breathing and produces the classic symptoms of "barking/brassy" cough, inspiratory stridor and a hoarse voice. Fever and runny nose may also be present. These symptoms may be mild, moderate, or severe. Often it starts or is worse at night and normally lasts one to two days. Croup can be caused by a number of viruses including parainfluenza and influenza virus. Rarely is it due to a bacterial infection. Croup is typically diagnosed based on signs and symptoms after potentially more severe causes, such as epiglottitis or an airway foreign body, have been ruled out. Further investigations, such as blood tests, X-rays and cultures, are usually not needed. (Full article...)


    The steeple sign as seen on an AP neck X-ray of a child with croup

    Croup, also known as laryngotracheobronchitis, is a type of respiratory infection that is usually caused by a virus. The infection leads to swelling inside the trachea, which interferes with normal breathing and produces the classic symptoms of "barking/brassy" cough, inspiratory stridor and a hoarse voice. Fever and runny nose may also be present. These symptoms may be mild, moderate, or severe. Often it starts or is worse at night and normally lasts one to two days.


    Croup can be caused by a number of viruses including parainfluenza and influenza virus. Rarely is it due to a bacterial infection. Croup is typically diagnosed based on signs and symptoms after potentially more severe causes, such as epiglottitis or an airway foreign body, have been ruled out. Further investigations, such as blood tests, X-rays and cultures, are usually not needed. (Full article...)
  • Did you know – show different entries

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    The following are images from various Medicine-related articles on Wikipedia.

    More Did you know (auto generated)

    • ... that James A. Merriman was the only Black graduate from Rush Medical College in 1902 and the first African-American physician to practice medicine in Portland?
  • ... that Tang Zonghai was one of the first advocates for the integration of Chinese and Western medicine?
  • ... that Indian gynaecologist and reproductive medicine pioneer Baidyanath Chakrabarty, who performed over 4,000 IVF procedures, was a cricket fan who thought Virat Kohli and Ashwin were "such good boys"?
  • ... that a lack of screening for pregnant women with syphilis in sub-Saharan Africa is associated with increased infant mortality?
  • ... that the Anglo-Saxons may have used a mixture of garlic, another Allium, wine, and bovine bile as an eye medicine?
  • ... that Ala Stanford established the Black Doctors COVID-19 Consortium to fight racism in medicine, vaccinating nearly 4,000 people?
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