MB 351 Lecture 39: 11.2 Chain of Infection I
Document Summary
Study of cause of disease: most unknown is that of viruses and cancer. Infectious diseases: metazoans, multicellular animal parasites, hookworms and roundworms, protozoan parasites. Single cell euk: malaria, bacteria and viruses, prions. Source of pathogen: usual habitat where it lives and multiplies, reservoirs. Site or nat env where it normally lives: human, direct ppl to ppl, ex: std, measles, respiratory, acute clinical. Infected with disease and are ill: carriers, carry infection but not ill, unaware of infection so more risk. Incubatory: will get sick, but later on but transmit before infection starts, convalescent. Infectious before and after they get ill: chronic carriers, can be infectious year after recovery, asymptomatic, never experience symptoms but can transmit, animal, animal to animal, humans are incidental hosts. Infect disease that is transmitted under natural cond from animals to humans: environmental or inanimate, plants, soil, water.
