Transmission of agent by vectors is facilitated by the following ways except one -: (A) Contamination with body fluids of vectors, (B) Scratching-in of infected feces, (C) Ingestion of infected material, (D) Regurgitation
Answer is C. Ans. is 'c' i.e., Ingestion of infected material o Methods in which vectors transmit agent are: a) Biting b) Regurgitation c) Scratching in of infective feaces. d) Contamination of host with body fluids of vectors