Oswego Case Study

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Outbreak- An occurrence of disease greater than would otherwise be expected at a particular time and place. Epidemic- An unexpectedly large number of cases of an illness, specific health-related behavior, or other health related events. Pandemic- An outbreak of disease over a wide geographical area, such as a continent. I would call this an epidemic. It could be defined as the occurrence of more cases in a place than expected. Of the 75 persons interviewed, 46 were ill will gastroenteritis during a 24-hour time period. This is clearly above the “expected” rate of illness in a community. 3. 1. Prepare to investigate a. Identify outbreak investigation team b.Review scientific literature c. Notify appropriate state and local entities d. Determine if immediate control measures are needed. 2. Verify the diagnosis and confirm out break a.Get laboratory confirmation b. Collect stool specimens from ill persons 3. Perform bacteriologic, virologic or parasitic testing a. Establish a set of standard criteria for deciding who are the ill persons related to the outbreak (“case-patients”) b. Narrow or broad (confirm, probable, suspect) c. DYNAMIC: may change during investigation 4. Case finding a. Conduct systematic search based on case definition b. Create line list of possible cases (people exposed ) 5. Perform descriptive epidemiology a.Tabulate and orient data : Person, place, and time b. Frequencies c. Mapping d. EpidemicCurve 6. Hypothesis generation—the how and the why a. Compare with known sources or similar out breaks b. Design questionnaire 7.Evaluate hypothesis thorough statistics a. Perform epidemiologic study:cohort,case-control b. Compare risk factors among ill (cases) vs not ill(controls) 8.Additional environmental studies a. Collect food,water,and/or environmental samples b.

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