Saturday, April 16, 2011

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Food poisoning - Staphylococcus aureus

It is a common cause of food poisoning.

It is due to the inoculation of toxin-producing S.aureus into food by colonized food handlers. The enterotoxin is heat stable unlike the bacteria which dies on warming/cooking. The toxin stimulates the vagus nerve and the vomiting center of the brain. It also appears to stimulate intestinal peristaltic activity.
Rapid onset usually within 1-6 hr.
Clinical features:
Nausea and vomiting, although diarrhea, hypotension, and dehydration may also occur.
The rapidity of onset, the absence of fever, and the epidemic nature of the presentation arouse suspicion of food poisoning.
Symptoms generally resolve within 8–10 h.

Treatment is entirely supportive.


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