This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'Jail fever is related to \nSelect and explain. \nA. Rickettsia prowazekii, B. Rickettsia conorii, C. Rickettsia Akari, D. Rickettsia Typhi', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Epidemic typhus due to infection with R. Prowazekii is transmittal by the human body louse which lives on clothes and is found in poor hygienic conditions (especially in jails) and usually in cold areas.', 'role': 'assistant'}]