The enteric infectious agent shaped like a comma that is often transmitted by raw or partially infected fish or shellfish is

The enteric infectious agent shaped like a comma that is often transmitted by raw or partially infected fish or shellfish is

• A. Vibrio cholerae
• B. Salmonella enterica
• C. Escherichia coli
• D. Campylobacter jejuni

Answer: (A)

The clue points to a curved, comma-shaped enteric bacterium. Vibrio cholerae is a classic example: it appears as a curved, comma-like Gram-negative rod. This shape, along with its association with seafood exposure, fits the scenario of transmission through raw or partially cooked fish or shellfish. Among the options, only this organism combines that distinctive comma shape with a seafood-related transmission route, making it the best answer. The other organisms are not comma-shaped—Salmonella enterica and Escherichia coli are straight rods—and while Campylobacter jejuni is curved, it is more commonly linked to poultry and unpasteurized dairy rather than fish or shellfish.

The clue points to a curved, comma-shaped enteric bacterium. Vibrio cholerae is a classic example: it appears as a curved, comma-like Gram-negative rod. This shape, along with its association with seafood exposure, fits the scenario of transmission through raw or partially cooked fish or shellfish. Among the options, only this organism combines that distinctive comma shape with a seafood-related transmission route, making it the best answer. The other organisms are not comma-shaped—Salmonella enterica and Escherichia coli are straight rods—and while Campylobacter jejuni is curved, it is more commonly linked to poultry and unpasteurized dairy rather than fish or shellfish.