Shellfish are often used as indicators for which bacteria?

Shellfish are often used as indicators for which bacteria?

• A. Salmonella and Listeria
• B. E. coli and Enterococci
• C. Campylobacter and Vibrio
• D. Staphylococcus aureus

Answer: (B)

Shellfish safety relies on indicator organisms that reflect fecal contamination in the water they filter and accumulate. E. coli and Enterococci are classic indicators because they come from feces, are relatively easy to detect, and their presence correlates with the likelihood of pathogenic organisms being present in shellfish. Monitoring these two gives a practical, quick measure of water quality and shellfish safety. The other bacteria listed are actual pathogens. Their detection signals contamination risk, but they are not used as general indicators of fecal pollution for shellfish testing.

Shellfish safety relies on indicator organisms that reflect fecal contamination in the water they filter and accumulate. E. coli and Enterococci are classic indicators because they come from feces, are relatively easy to detect, and their presence correlates with the likelihood of pathogenic organisms being present in shellfish. Monitoring these two gives a practical, quick measure of water quality and shellfish safety.

The other bacteria listed are actual pathogens. Their detection signals contamination risk, but they are not used as general indicators of fecal pollution for shellfish testing.