Test #2- Lecture #9
- Indiana University-Bloomington
- Microbiology M200
- Test #2- Lecture #9
Last Modified: 2011-03-01
Sites where pathogens are maintained as a source of infected are termed
Disease that are naturally spread from their usual animal host to humans
The study of where and when disease occur and how they are transmitted within populations
number of new cases of a disease in a given area during a given period of time
number of total cases of a disease in a given area during a given period of time
few scattered cases within a population or area
relatively stable incidence within a population or area
o Record info about the location and time of the cases of disease
o Collect patient information
John snow (1854)
o Mapped the locations of cholera cases in London
o Broad Street Water pump
Involves testing a hypothesis concerning the cause of a disease
application of Koch’s postulates
Testing the efficacy of a new preventative measure
Seeks to determine the probable cause, mode of transmission, and develop new preventative measures
uses data gathered from descriptive and analytical studies.
Useful in situations in which Koch postulates cant be applied
Often retrospective- investigation occurs after on outbreak has occurred
1. Work to limit disease transmission
-monitor water and food saftey
2. Campaign to educate the public on healthful choices to limit disease
Infections acquired while in the health care facility
Pathogen Acquired from the health care environment
Ex: hospitals are filled with sick people shedding pathogen
direct result of a modern medical procedure
Ex: catheters, surgery
Pathogen arise from normal microbiota due to factors within the health care setting
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