L1.7 outbreak investigation Flashcards
what are the steps of an outbreak investigation
- establish an outbreak
- convene an outbreak control team
- define a case
- search for cases
- generate hypotheses
- environmental lab investigations
- test hypotheses
- draw conclusions
- communicate findings
what are trawling questionnaires
open ended questions for cases, often conducted by EHOs
what is descriptive epidemiology
TIME, PLACE, PERSON
what do epidemic curves show
can provide evidence for causation organism, incubation period, time of exposure and magnitude of outbreak
what are the two types of common source epidemic curve
would be used can be intermittent or continuous
what does a point source epidemic curve show
type of common outbreak
what is an example of when would a point source endemic curve be used
salmonella outbreak from a wedding
when is an example that a common source epidemic curve would be used
happens when a group of people get sick after eating the same contaminated food at the same restaurant on the same day.
what does a propagated epidemic curve show
no common source because outbreak spreads from person-person
what is an example of a propagated epidemic curve
covid-19
what are type 1 errors
The type I error rate or significance level is the probability of rejecting the null hypothesis given that it is true.
what are type 2 errors
describes the error that occurs when one fails to reject a null hypothesis that is actually false
