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
Transmission of agent by vectors is facilitate by the following ways except one- 
Select and explain. 
A. Contamination with body fluids of vectors, B. Scratching - in of infected feces, C. Ingestion of infected feces, D. Regurgitation
C: Ingestion of infected feces
Answer: C: Ingestion of infected feces 
Explanation: Methods in which vectors transmit agents: Biting Regurgitation Scratching in of infective faeces Contamination of host with body fluids of vectors (refer pgno:98 park 23 rd edition)