This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Rickettsiaceae, Subject name: Microbiology
[{'content': 'Which of the following infection is mainly diagnosed by serological tests- \nSelect and explain. \nA. Actinomycosis, B. Q Fever, C. TB, D. Leprosy', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Q fever o The diagnosis of actinomycosis is most commonly made by microscopic identification of sulphur granules,o In most instances, the diagnosis of Q-fever relies upon serology,o TB is usually diagnosed by sputom microscopy and/or culture.o Leprosy is diagnosed clinically which is confirmed by histological examination of skin biopsies and by the detection of acid fast bacilli in nasal discharges, scraping from nasal mucosa and slit-skin smear.", 'role': 'assistant'}]