• Causes of rapid-onset food poison (< 6 hours) are due to ingestion of pre-formed toxin and are most commonly caused by Staph aureus (cream-based food such as egg salad) or Bacillus cereus (reheated rice syndrome)
• Clostridium perfringens (improperly cooked/stored meat) is another cause of food poisoning, but often occurs 6-24 hours after ingestion because patients ingest spores which need germinate in digestive tract to secrete toxin

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