Which biological agent would most commonly cause nausea, vomiting and food poisoning symptoms?

• A. Salmonella
• B. Botulism
• C. Anthrax
• D. Ricin

Answer: (A)

Salmonella is the prototypical cause of foodborne gastroenteritis. It’s a common bacterium found in contaminated or undercooked foods (like poultry, eggs, dairy, and some produce), and infection typically presents with nausea, vomiting, abdominal cramps, and diarrhea within about 6–72 hours of exposure. Most cases are self-limiting and treated with fluids and rest; antibiotics aren’t always needed except for high-risk individuals or severe illness.

Botulism centers on a neurotoxin producing progressive weakness and cranial nerve problems rather than a straightforward gastrointestinal illness. Anthrax GI involvement is rare and usually more severe, with systemic signs. Ricin is a toxin that can cause GI symptoms but is not a common infectious-food-poisoning agent. So Salmonella best fits the scenario of common nausea, vomiting, and food poisoning symptoms.