Transovarian transmission of infection occurs in -: (A) Fleas, (B) Ticks, (C) Mosquitoes, (D) Sandfly
Answer is B. Ticks transmit disease by biting (larva and nymph also by biting) - Trans-stadially Experiments in ticks have shown trans-ovarian transmission of infection through successive generations. REF: PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE, 25TH EDITION, PG NO. 840