PATH 3610 Study Guide - Midterm Guide: Squamous Intraepithelial Lesion, Melanoma, Peptic Ulcer

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Infecion: the muliplicaion of a parasiic organism in or on a body (not all infecious are parasiic, and not all parasites are infecious) Incidence: number of individuals afected in a period of ime (usually one year) Prevalence: number of cases at any given ime (how widespread it is) Contagious: transmited directly to another host of same species. Direct transmission: verical (from the mother to child - geneic diseases, across placenta and milk) or horizontal transmission (from one individual to another) Indirect transmission: transmission via a vector or other method. Zoonoic infecion: acquired by humans from a vertebrate animal. Outcome depends on quality of care (outcome is bad in third world countries) Arbovirus: virus spread by insect (in this case mosquito) Viremia (viruses enter bloodstream) & systemic inlammatory response. Symptoms: mother gets lu-like symptoms, but babies born from infected mother have microencephaly (under-sized brains) Infecious agents: prions, viruses, bacteria, fungi, chlamydiae, ricketsia, mycoplasma, protozoa, helminthes, arthropods.

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