BIOS10115 Lecture Notes - Lecture 12: Herd Immunity, Etiology, Dracunculus Medinensis
1 Nov 2016
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Multiplications of microbes in or on host. Low: rarely cause disease (or produce mild disease) Intensity of the disease caused by a pathogen. Repeated passage of pathogen to a new host. Live in or on without causing disease (commensalism) 10x more microbes per body than cells in body. Body parts that are normally microbe free. Can cause disease if conditions are right. Non-living objects that harbor an infectious disease. The study of disease frequency, disease spread and disease control (fsc) # of cases in a population in a given time period (new cases) # of cases in a population having a disease (new and existing) May show shifts depending on the weather but not necessarily. Given time at which disease is higher than normal. Sites where organisms can maintain their ability to infect. For polio 70% need to be immunized. A major reason why vaccinations are critical for all. Most feasible with organism with single host.
