Onset of Staphylococcal enterotoxin B illness is typically within 4-10 hours after exposure.

• A. True
• B. False
• C. 24-48 hours
• D. 1-2 weeks

Answer: (A)

Staphylococcal enterotoxin B illness is driven by a toxin that is already present in contaminated food, so symptoms appear very quickly after ingestion. Because the toxin acts directly on the gastrointestinal tract, the incubation period is short—typically around 4 to 6 hours and sometimes up to about 10 hours. This rapid onset distinguishes toxin-mediated food poisoning from infections that require bacterial growth in the gut, which take longer to produce symptoms (often a day or more). The illness is usually self-limited and resolves within 24 hours. Therefore, the statement that onset is typically within 4-10 hours is accurate.