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What pandemics have the most impact on humanity?
plague among Philistines
St Justinians Plague
Black Death
smallpox in americas
What diseases were introduced into the new world via colonization? Why were these specific diseases propagated so easily?
smallpox
measles
typhus influencza
malaria
yellow fever
infectious, communicable diseases, some-vector borne; easily transmitted between ppl, esp in crowded areas
What is an infectious disease?
illness from infection by a pathogenic organism or its products
ex. flu, HIV, malaria, measles
What is a communicable disease?
illness due to transmission of a pathogen or its toxic products between individuals (either directly or through vector/host)
ex. flu, malaria, TB measles
Is botulism infectious, communicable, or both? why?
infectious - bacterial toxin causes disease, but doesn’t exit human body to infect others
Is lyme disease infectious, communicable, or both? why?
both - bacteria spread through tick vector
What is the urban cycle of a diseases?
pattern in which an infectious disease is maintained and transmitted mainly among humans in cities or densely populated areas
often with help from a vector such as mosquitoes
Describe the yellow fever commission in terms of how it discovered routes of pathogen transmission
Needed to prove hypothesis that mosquitoes spread YF and “fomites”/vomit/close exposure does not
designed 2 buildings - one with infected clothing and one with mosquitoes
infected clothing patients did not get sick - YF not spread via fomites
mosquito patients infected - YF spread via mosquitoes
YF patient blood transmitted to healthy people, they developed YF - blood holds and can transmit YF bacteria
How is the plague different today?
less contagious
better containment and sanitation
usually spread through jungle route via rodents rather than urban, pnuemonic route
What was the impact of disease on the new world?
smallpox, measles, typhus, syphillis, etc. caused mass death, reduced agricultural production, easier colonization