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Bacillus Cereus Disease

Rods in Seared-rice
Picmonic
Bacillus cereus is a bacteria known for causing food poisoning, typically with reheated rice and pastas. It forms toxins and enterotoxins, which can lead to emetic and diarrheal types of diseases, respectively. Emetic type is seen with reheated rice, and displays nausea and vomiting shortly after ingestion. Diarrheal type causes watery, non-bloody diarrhea within 8-16 hours after ingestion.
6 KEY FACTS
SIGNS AND SYMPTOMS
Emetic Form
Medic

The emetic form of this disease occurs 1-6 hours after ingestion of toxins. It is caused by rice cooked for a time and temperature insufficient to kill any spores present. Even by reheating later, which then kills bacillus spores and vegetative cells, symptoms occur because one of the toxins produced, cereulide, is not inactivated at high temperatures.

Short Incubation (1-6 Hours)
Short Incubator with (1) Wand to (6) Sax

The emetic form of this disease, caused by the toxin cereulide, has a short incubation period. Symptoms occur within 1-6 hours of toxin ingestion.

Nausea and Vomiting
Vomiting

Symptoms of this form of Bacillus cereus food poisoning include nausea and vomiting shortly after toxin ingestion.

Diarrheal Form
Toilet

The diarrheal form of B. cereus food poisoning comes from a wide range of food, occurs 8-16 hours after ingestion of toxins, and is associated with diarrhea and GI pain. Symptoms occur from ingestion of enterotoxins, and this disease may be difficult to differentiate from C. perfringens food poisoning.

Long Incubation (8-16 Hours)
Long Incubator with (8) Ball to Sweet (16)

This form of disease has a longer incubation period, with symptoms occurring 8-16 hours after ingestion of the enterotoxins.

Diarrhea and GI Pain
Toilet and GI with Pain-bolts

Patients with this form of B. cereus food-born illness complain of watery diarrhea, abdominal cramps and gastrointestinal pain, which may last for up to 24 hours.

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