What is the purpose of stool sample collection in suspected Salmonella infection?

• A. To identify Salmonella
• B. To treat infection
• C. To vaccinate
• D. To measure antibodies

Answer: (A)

Stool sample collection in suspected Salmonella infection is done to identify the causative organism through culture of the stool. This confirms the diagnosis by allowing Salmonella to be isolated and distinguished from other pathogens, and it also helps guide public health actions and, when needed, antimicrobial decisions (such as choosing appropriate therapy based on susceptibility). It isn’t used to treat the infection directly, to vaccinate, or to measure antibodies, since vaccines are preventive and antibody testing is done on blood, not stool. In practice, samples are collected during the acute phase (sometimes more than one on different days) to maximize the chance of detection, and a positive result supports confirmation of infection and informs management and reporting.