A 6-year-old boy develops vomiting and abdominal pain 6 hours after ingesting dairy products. What is the likely causative organism______________?
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Answer: A. Staph. aureus
Explanation
Staphylococcus aureus food poisoning has a rapid onset of symptoms caused by preformed enterotoxins. Contaminated dairy products left at room temperature allow bacterial proliferation and toxin production. Patients typically experience sudden vomiting and abdominal cramps within hours of ingestion. Staphylococcus aureus is a gram-positive bacterium capable of producing heat-stable enterotoxins in food. Foodborne intoxication differs from bacterial infection because illness results from toxins rather than live organisms. Dairy items, custards, and meat products are frequent vehicles for staphylococcal food contamination.
Proper food handling and refrigeration prevent bacterial multiplication and subsequent toxin accumulation in meals. Gastroenteritis outbreaks linked to picnics often point toward staphylococcal contamination in unrefrigerated dishes. Symptomatic treatment is usually sufficient because the illness is self-limiting and resolves quickly. Salmonella infections typically have a much longer incubation period before producing diarrheal symptoms. Bacillus cereus is commonly associated with improperly stored rice dishes rather than dairy products. Clostridium botulinum causes neuroparalytic illness with a different clinical presentation and delayed onset.
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