What is the common symptom of diarrhea associated with B cereus ingestion?

The common symptom of diarrhea associated with Bacillus cereus ingestion is watery diarrhea. Bacillus cereus is known for causing two types of gastrointestinal illness: emetic and diarrheal. The diarrheal illness is typically characterized by the production of an enterotoxin that leads to the rapid onset of watery diarrhea, often accompanied by abdominal cramps and a sense of urgency. This type of diarrhea is generally non-bloody and can occur 6 to 15 hours after ingestion of contaminated food, commonly rice dishes.

Other forms of diarrhea, such as bloody diarrhea or chronic diarrhea, are not typically associated with Bacillus cereus. Bloody diarrhea would suggest the presence of an invasive pathogen or tissue damage that B. cereus does not cause. Chronic diarrhea would also be unlikely, as Bacillus cereus infections usually result in acute illnesses rather than prolonged symptoms. Though diarrhea with nausea can occur, it is the watery nature of the diarrhea that is distinctly linked to this pathogen.