Which group of organism is responsible for transmitting endemic typhus?: (A) Flea, (B) Tick, (C) Mite, (D) Mosquito
Answer is A. The etiologic agent of endemic typhus (murine typhus fever or fleaborne typhus) is Rickettsia typhi, a Gram-negative bacterium and obligate intracellular pathogen. Reservoirs include rats, mice, possibly other mammals, and infected rat fleas. Endemic typhus has a worldwide occurrence.