What toxins does Bacillus cereus produce?

• A. A single toxin
• B. No toxins produced
• C. Three toxins none are enterotoxins
• D. Two enterotoxins: Emetic (heat stable) and Diarrheal (heat labile)

Answer: (D)

Bacillus cereus is known for causing food poisoning through two toxin types that behave very differently with heat. It makes an emetic toxin, cereulide, which is heat-stable and can survive cooking; this toxin in preformed food triggers vomiting relatively quickly after ingestion. It also produces diarrheal enterotoxins that are heat-labile and produced in the intestine after the food is eaten, leading to diarrhea and abdominal cramps. Because one toxin survives heat and the other is inactivated by heat, the organism can cause two distinct illness patterns. That’s why the correct statement describes two toxins: an emetic toxin that is heat-stable and diarrheal enterotoxins that are heat-labile.