This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
[{'content': 'Causative agent of Q-fever - \nSelect and explain. \nA. Rickettsia rickettsii, B. Rochalimaea quintana, C. Rickettsia tsutsugamushi, D. Coxiella burnetii', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Coxiella burnetii DiseaseAgentInsect vectorMammalian reservoir1.Typhus group a. Epidemic typhusR. prowazekiiLouseHumans b. Murine typhus (Endemic typhus)R. typhiFleaRodents c. Scrub typhusR. tsutsugamushiMiteRodents2.Spotted fever group a. Indian tick typhusR. conoriiTickRodents, dogs b. Rocky mountain spotted feverR. rickettsiiTickRodents, dogs c. Rickettsial poxR. akariMiteMice3.Others a. Q feverC. burnetiiNilCattle, sheep, goats. b. Trench feverRocholimaca quintanaLouseHumans", 'role': 'assistant'}]