THE ARTHROPOD-BORNE ENCEPHALITIS VIRUSES, THE NEGLECTED SERIOUS DISEASES

Abstract

Arthropod-borne encephalitis viruses are highly adapted to a particular reservoir host. Viruses spread from animal to animal by an infected specific mosquito or tick species. Mosquito or tick becomes infected when feeding on the viremic animal blood. Virus then replicates in the vector, ultimately infecting the salivary glands, which transmits the virus to a new host with infective saliva while taking a blood meal. Infected patients may become ill; they usually do not develop sufficient viremia to infect feeding vectors, and thus do not contribute to the transmission cycle.