This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable Diseases, Subject name: Social & Preventive Medicine
Epidemic ty phus cause & vector - 
Select and explain. 
A. Rickettessiae prowazki & Louse, B. R. typhi & mite, C. R. conorii & tick, D. R. akari & mite
A: Rickettessiae prowazki & Louse
Answer: A: Rickettessiae prowazki & Louse 
Explanation: Ans. is 'a' i.e.. Rickettessiae prowazki & Louse Rickettsial diseasesDiseaseAgentInsect vectorMammalian reservoir1. Typhus groupa. Epidemic typhusb. Murine typhus (Endemic typhus)c. Scrub typhusR. prowazekiiR. typhiR. tsutsugamushiLouseFleaMiteHumansRodentsRodents2. Spotted fever groupa. Indian tick typhusb. Rocky mountain spotted feverc. Rickettsia] poxR.conoriiR.rickettsiiR.akariTickTickMiteRodents, dogsRodents, dogsMice3. Othersa. Q feverb. Trench feverC.bumetiiRocholimacaquintanaNilLouseCattle, sheep, goats.Humans