This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
[{'content': 'The incubation period for Bacillus Cereus in case of the emetic type of food poisoning \nSelect and explain. \nA. 1-6 hours, B. 8-16 hours, C. 24 hours, D. > 24 hours', 'role': 'user'}, {'content': "Answer: A \nExplanation: Bacillus cereus: an impoant cause of food poisoning. Two patterns: diarrheal and emetic. Emetic type: associated with consumption of cooked rice, usually fried rice from restaurants. Nausea and vomiting 1-5 hours after the meal. Bacilli present in large numbers in cooked rice and fecal samples from these patients. Diarrheal type: associated with a wide range of foods including cooked meat and vegetables. It is characterized by diarrhea and abdominal pain, 8-16 hrs after ingestion of contaminated food. Reference: Textbook of Microbiology; Anathanarayan and paniker's; 10th edition; Page no: 253", 'role': 'assistant'}]