Term
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Definition
| -animals are exposed to the same exposure over a limited, defined period of time, usually within one incubation period |
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Term
| Definition: Continuous common source |
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Definition
| -exposure to the source is prolonged over an extended period of time and may occur over more than once incubaiton period |
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Term
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Definition
| -a case of disease serves as a source of infection for subseequent cases and htose subsequent cases, in turn, serve as sources for later cases |
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Term
| Describe the graphic representation of a point source outbreak. |
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Definition
| -the shape of this curve commonly rises rapidly and contains a definite peak at the top, collowed by agradual decline |
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Term
| Describe the graph of a continuous common source outbreak. |
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Definition
| -the down slope of the curve may be very sharp if the common source is removed or gradual if the outbreak is allowed to exhaust itself |
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Term
| Describe the graph associated with propagating. |
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Definition
| -shape of curve usually contains serioes of successively larger peaks, reflecting increasing number of cases caused by direct ocntact, until the pool of susceptibles is exhausted or control measures are implemented |
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Term
| What are the specific objectives of an outbreak investigation? |
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Definition
-determine the causes: specific etiologic diagnosis & important risk factors
-ID how animals were exposed
-determine the extent of hte problem
-take corrective actions
-recommend preventive actions |
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Term
| What are the steps for an outbreak investigation? |
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Definition
1) verify an outbreak is occuring
2) gather info from responsible personnel
3) establish a case definition
4) examine healthy animals
5) examine sick animals
6) examine dead animals 7) consider findings distinguishing cases and others
7) develoop hypotheses/ rule-outs
8) analytical assessments
9) rach tentative diagnosis/ conclusion
10) make recommendations for prevention in the future
11) write up/ disseminate for others? |
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Term
| What are some examples of analytical epidemiology? |
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Definition
-morbidity rate
-death rate
-case-fatality rate
-specific attack rates according to host attributes
-RR, OR, other data calculations as indicated |
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