<prompt> Transmission of agent by vectors is facilitated by the following ways except one -Contamination with body fluids of vectorsScratching-in of infected fecesIngestion of infected materialRegurgitation  <response>: 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 