HLTB21H3 Lecture Notes - Lecture 1: Intracellular Parasite, Smallpox, Cholera
Document Summary
If we think about our evolutionary history infectious diseases have always been a part of human existence that have actually helped us evolve. Our immune system have developed enough to stop infectious diseases in most cases. Our immune systems have adapted to these infectious diseases and now are prone to most of them, therefore we are usually good to go. Small pox highly infectious disease of the skin: killed a lot of people in the past, europeans. When new emergent diseases encounter a new society or environment they infect they population and wipe them out because the society had no prior contact with the disease. Causes of infectious disease: microparasites small, able to reproduce directly within hosts; relatively short duration of infection; produce immune response in infected individs) Rickettsiae : bacteria-like structure that are obligate intracellular parasites of mammals during some stages of animal life cycle they must live within the cell of a mammal living off of their resources.
