SAR HS 300 Study Guide - Midterm Guide: Recap (Software), Case Fatality Rate, Helminths
3 Jan 2017
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Attack rate: #ill / #ill + #well x 100: used for infectious diseases and acute epidemics. Incidence rate that is used when occurrence of disease or condition among population at risk. Secondary attack rate: number of total cases initial cases / susceptible population initial cases: example: there are 20 soldiers. Case fatality rate (cfr): number of deaths cause by a disease among those who have disease. Examples include rabies, cholera, aids: number of deaths by disease z / number of cases. Agents: bacteria, viruses/rickettsia, mycoses (fungal diseases), protozoa, helminths, arthropods. Infectivity: capacity of an agent to enter and multiply in a susceptible (measure of contagion) Measured by secondary attack rate: # infected / # susceptible: pathogenicity: capacity of agent to causes disease in host. Measured by the proportion of severe or fatal cases. Environment: external domain where host or agent lives.
