Bacillus cereus

Bacillus cereus

Characteristics

·         Motile

·         Non-encapsulated

·         Obligate pathogen

Reservoirs

·         humans (not normal flora)

·         Soil (primarily spores)

Transmission

·         Contaminated food (primarily rice)

Toxins

·         Bacillus heat-labile enterotoxin (analogous to choleragen causes diarrheal food poisoning

·         Bacillus heat-stabile enterotoxin (analogous to staphylococcal enterotoxin, causes emetic food poisoning)

 Diseases

 1. Diarrheal Food Poisoning

 ·         Diarrheal gastroenteritis (abdominal pain, vomiting and watery diarrhea)

·         Spontaneously resolves in < 24 hours

·         Caused by Bacillus cereus contamination of food "production and secretion of bacillus heat-labile enterotoxin" ingestion of bacillus heat-labile enterotoxin-contaminated food

 

2. Emetic Food Poisoning

 ·         Emetic gastroenteritis (severe vomiting)

·         Spontaneously resolves in < 24 hours

·         Caused by Bacillus cereus contamination of food "production and secretion of bacillus heat-stabile enterotoxin " ingestion of bacillus heat-stabile enterotoxin-contaminated food

 Treatment

·         Oral fluid and electrolyte replacement

 

 

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