Which surveillance type uses selected reporting sites to monitor trends in disease occurrence?

Which surveillance type uses selected reporting sites to monitor trends in disease occurrence?

• A. Sentinel surveillance
• B. Active surveillance
• C. Passive surveillance
• D. Syndromic surveillance

Answer: (A)

Using a network of selected reporting sites to monitor trends in disease occurrence is sentinel surveillance. The idea is to keep a focused, representative set of sites—such as certain clinics or hospitals—that consistently report data for a specific disease or condition. This setup provides timely information on how disease levels are changing over time and across locations without trying to count every single case nationwide. It’s efficient and good for detecting trends and early signals of change. In contrast, active surveillance involves the health authorities actively seeking out cases, which is thorough but resource-intensive. Passive surveillance relies on routine reporting from healthcare providers and can miss cases if reporting is incomplete. Syndromic surveillance tracks symptoms or other rapid indicators (like ER visits or over-the-counter drug sales) to spot potential outbreaks quickly, but it may be less specific about confirming actual cases.

Using a network of selected reporting sites to monitor trends in disease occurrence is sentinel surveillance. The idea is to keep a focused, representative set of sites—such as certain clinics or hospitals—that consistently report data for a specific disease or condition. This setup provides timely information on how disease levels are changing over time and across locations without trying to count every single case nationwide. It’s efficient and good for detecting trends and early signals of change.

In contrast, active surveillance involves the health authorities actively seeking out cases, which is thorough but resource-intensive. Passive surveillance relies on routine reporting from healthcare providers and can miss cases if reporting is incomplete. Syndromic surveillance tracks symptoms or other rapid indicators (like ER visits or over-the-counter drug sales) to spot potential outbreaks quickly, but it may be less specific about confirming actual cases.