<prompt> True about scrub typhus-No escharTransmitted by bite of mitesCaused by R typhiNo transovarial transmission  <response>: Ans. is b i.e., Transmitted by bite of mitesScrub typhus Scrub typhus is the most widespread Rickettsial disease. It is caused by R. tsutsugamushi orientia tsutsugamushi and the vector of its transmission is trombiculid mite Leptotrombidium delineseand L. akamushi. It is transmitted to man by the bite of infected larval mites. The nymphal and adult stages of the mite are free living in the soil; they do not feed on vertebrate host. It is the larva chigger that feed on vertebrate hosts and picks up the rickettsiae. The infection is maintained in nature trans-ovarially from one generation of mite to next. Clinical features include fever, headache, lymphadenopathy and rash with eschar. 