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IMM250H1 Study Guide - Midterm Guide: Lady Mary Wortley Montagu, Muhammad Ibn Zakariya Al-Razi, Fowl Cholera

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Dana Philpott
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the black plague
thought to be spread by trade routes; worsened by migrations
rats had fleas, fleas carried the Yersinia pestis bacteria that caused the plague
(cats were seen as evil, which didnt help because you needed cats to get rid of the rats)
::farmers were hit, they cut off food supplies causing starvation
::Mongolian Empire collapsed in Central Asia
::superstitious views dominated, Jews were persecuted
::civic services shut down
::peasants were taxed more leading to the peasant revolt in 1371
::education and architecture were put on hold
survivors had an immunological advantagemaybe beneficial mutations
the survivors also benefitted from greater resourcesleading to the Renaissance
::Renaissance could also be attributed to the disillusionment of the church or the collapse of feudalism
*immunity: the quality or state of being immune; a condition of being able to resist a particular disease; that which confers protection against disease
::first seen in 2000 BC: The Babylon Epic of Gilgamesh had accounts of pestilence and disease
*variolation: inoculating someone with the virus of smallpox to induce the disease
Person Contribution to Science
Thucydides-430 B.C.
-saw that some people were infected with disease, but they survived and werent infected again = immune
-didnt know what caused the disease outbreak, while elders believed it was a supernatural forcethe Gods
wanted ithe didnt believe the same
Abu Bakr Muhammad ibn Zakariya Razi (Ar-Razi)-Persian physician and alchemist
-died in 930 A.D.
-first to use humoralism (disease treatment is based on the imbalance of humoursmelancholic, choleric,
phlegmatic, sanguinewhich explain why some get sick and others dont) to distinguish one type of
disease from another
-first to diagnose smallpox versus measles = different diseases are caused by different microorganisms
-recognized epidemic force of smallpox
-first to describe allergic asthma
-first to understand fever is a mechanism for fighting infection
Avicenna -Persian philosopher and physician
-died in 1037 A.D.

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-father of modern medicine
-wrote The Canon of Medicine
Person Contribution to Science
Avicenna (contd) -::how to run a clinical trial
::experimental medicine
::evidence-based medicine
::contagious nature of infectious diseases
::acquired immunity
Girolamo Fracastoro-suggested contagious particles transmitted diseases even over long distances
-wrongly thought immunity to measles conferred immunity to smallpox
Lady Mary Wortley Montagu -1717, learned variolation in Constantinople, had several prisoner and abandoned children inoculated (had
smallpox inserted under their skin); when observed none contracted the disease, deemed the procedure
-she had herself and many other members of the Royal Family inoculated, making it fashionable in Europe
Edward Jenner, Sarah Nelmes, James Phipps -noticed milk maids rarely had smallpox
-knew smallpox was carried by cows and milk maids had blisters from milking the cows, observed the pox
from the blisters werent as virulent as actual small pox
-1796 inoculated James Phipps with material from the milk maid Sarah Nelmes blisters
-James Phipps developed a slight fever but nothing more
-Phipps was exposed to variolation, no symptoms were observed suggesting he had acquired immunity
Charles Chamberlain-Pasteur’s assistant
-was supposed to inoculate chickens with chicken cholera but didnt and went on vacation
-when he came back from vacation, was inoculated the chickens with chicken cholera but they didnt get
Louis Pasteur -attenuated germ cultures
-noticed that something had happened during the vacation in the cultures that made the chicken cholera less
-determined that attenuated chicken cholera cultures could induce acquired immunity in chickens to
virulent cholera
-this discovery was extended to cattle anthrax and rabies
Joseph Meister-bit by rabid dog in Germany and was taken to France to get rabies vaccine
-the first person to receive the rabies vaccine, was completely cured
Robert Koch-implemented postulates for how microorganisms mediate disease
1) microorganism must be found in organisms suffering from the disease, but not in healthy people
2) microorganism must be isolated from a diseased organism and cultured
3) cultured microorganism must cause a disease in healthy organisms when infected with it
4) microorganism must be re-isolated from the diseased host and identified as identical to the original
-if all the postulates were met by the microorganism, it was the causal agent

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-observed DTH (delayed hyper-sensitivity) where an animal previously infected with TB is re-infected
intra-cutaneously , a local inflammatory reaction marked by necrotic lesions will develop rapidly and heal
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