In surveillance terms, how are most clinical salmonellosis cases handled?

• A. Only a small proportion are recognized clinically, and as few as 1% are reported.
• B. Most cases are recognized clinically and reported.
• C. Most cases are misdiagnosed as other diseases.
• D. Most cases are treated without any diagnostic testing.

Answer: (A)

In surveillance, there is a big gap between who actually gets sick and what gets recorded. For salmonellosis, most people with illness either don’t seek care or don’t have stool cultures done, and even when care is sought, not every case is reported to public health. Because reporting often depends on laboratory confirmation or clinician notification, only a small share of cases makes it into surveillance records. That’s why the statement that only a small portion are recognized and as few as 1% are reported best reflects how surveillance captures this disease.

The other ideas would imply that most cases are seen and reported, or that diagnosis is rarely involved or that treatment happens without testing, which doesn’t align with how surveillance data are actually collected and the typical patterns of underreporting.