Transovarian transmission is a feature of-: (A) Scrub fever, (B) Epidemic typhus, (C) Endemic typhus, (D) Trench fever
Answer is A. The causative agent of scrub typhus: Rickettsia tsutsugamushi. It is the larva that feeds on veebrate hosts and picks up the rickettsias. The larval stage serves as both as a reservoir, through ovarian transmission and as a vector for infecting humans and rodents (refer pgno 300 park 23rd edition)