<prompt> It is true regarding endemic typhus that ?Man is the only reservoir of infectionFlea is a vector for the diseaseThe rash developing into eschar is a characteristic presentationCulture of the etiological agent in tissue culture is a diagnositc  <response>: Ans. is b i.e., Flea is a vector for the disease . Endemic typhus is transmitted by the rat flea. . Rats are the major reservoir . There is no eschar in endemic typhus Diagnosis is made by serological test IFA or PCR amplification of R typhi DNA from blood - 