Exam 3

What is Epidemiology?
– The study of occurrence, distribution and control of infectious disease in populations
What are aspects of Epidemiology?
– Terminology – disease reservoirs and carriers – disease transmission – AIDS and nosocomial epidemiology – public health
What are the three main types of disease occurrence?
-Endemic -Epidemic-Pandemic
Define “Incidence” in Epidemiologic terms
– number of new cases of a disease in a given area during a given time period
Define “Prevalence” in Epidemiologic terms
– number of total cases of a disease in a given area during a given period of time
What are the stages of disease progression?
– incubation period – prodromal period – initial symptoms – illness (acute) period – decline period – convalescent period
What are modes of disease transmission?
-Contact Transmission-Vehicle transmission-Vector Transmission
What are microbe disease mechanisms?
-Growth of the microbe in an inappropriate place-Production of toxic substances (i.e. exotoxins)
How can transmission be prevented?
-food protection laws-respiratory: masks-washing hands, etc
What is the fastest growing category for new AIDS cases?
-heterosexual adults
What is Surveillance?
-observation, recognition, reporting of diseases-provides forewarning