This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Which of the following has least minimum infective dose(MID) required for causing infection: \nSelect and explain. \nA. Salmonella typhi, B. Campylobacter jejuni, C. Shigella dysentery, D. Vibrio cholera', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) Shigella dysentery "Shigella cause bacillary dysentery. Infection occur by ingestion. The minimum infective dose is low: as few as I0-I(N bacilli are capable of initiating the disease, probably because they survive gastric acidity better than other enterobacter"- Ananthanarayan.', 'role': 'assistant'}]