Experimental Transmission of Eastern Equine Encephalitis Virus by Strains of Aedes albopictus and A. taeniorhynchus (Diptera: Culicidae)
ARMY MEDICAL RESEARCH INST OF INFECTIOUS DISEASES FORT DETRICK MD
Pagination or Media Count:
The vector competence of Aedes taeniorhynchus Wiedemann and four strains of Aedes albopictus Skuse was assessed for eastern equine encephalitis EEE virus isolated from Ae. albopictus collected in Polk County, Florida. Both species became infected with and transmitted EEE virus by bite after feeding on 1-d-old chicks that had been inoculated with EEE virus viremia 1010.1 plaque-forming units PFU per ml of blood. However, when fed on an older chick with a lower viremia viremia 106.1 PFU per ml of blood, Ae. albopictus was significantly more susceptible to infection 90, n 61 than was Ae. taeniorhynchus 15, n 40. Transmission was also significantly more efficient by Ae. albopictus 36, n 44, than by Ae. taeniorhynchus O, n 14. These data, combined with the recent isolation of EEE virus from Ae. albopictus and its opportunistic feeding behavior, indicate that Ae. albopictus could function as a bridge vector between the enzootic Culiseta melanura Coq.-avian cycle and susceptible mammalian hosts. Aedes albopictus, Vector competence, Eastern equine encephalitis virus.
- Medicine and Medical Research