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
Epidemic typhus is transmitted by - 
Select and explain. 
A. Mite, B. Louse, C. Flea, D. Tick
B: Louse
Answer: B: Louse 
Explanation: Ans. is 'b' i.e., Louse 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