This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
Transovarian transmission is seen in 
Select and explain. 
A. Ticks, B. Louse, C. Flea, D. None
A: Ticks
Answer: A: Ticks 
Explanation: Ticks transmit disease by biting. The larva and nymph are also capable of transmitting disease. (infection is maintained transstadially)experiments have also shown transovarial transmission of infection through successive generations. (refer pgno 781 park 22rd edition)