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PSM · Epidemiology: syndromic surveillance
Sample itemA district health officer tracks daily school absenteeism and pharmacy sales of antipyretics to detect a possible influenza outbreak before laboratory confirmation. What type of surveillance is this?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
D. Syndromic surveillance
Syndromic surveillance uses pre-diagnostic data such as absenteeism, drug sales and symptom reports to detect outbreaks early. It does not need a confirmed diagnosis. Sentinel surveillance relies on selected reporting sites.
Option by option
A. Serological surveillance
Serological surveillance measures antibodies in population samples.
B. Active case finding
Active case finding means house-to-house search for cases.
C. Sentinel surveillance
Sentinel surveillance depends on selected reporting units, not on proxy indicators.
D. Syndromic surveillance (correct)
Correct. Pre-diagnostic indicators serve as an early warning in syndromic surveillance.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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