Vector Competence of Senegalese Aedes fowleri (Diptera: Culicidae) for Rift Valley Fever Virus1
- 1 July 1988
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Medical Entomology
- Vol. 25 (4) , 262-266
- https://doi.org/10.1093/jmedent/25.4.262
Abstract
Studies were conducted to determine the ability of a West African strain of Aedes fowleri (Charmoy) to transmit Rift Valley fever (RVF) virus. Infection rates ranged from 11% (12/105) for mosquitoes that ingested 101.3-1.6 plaque-forming units (PFU) of virus to 89% (206/231) for those ingesting >106.4 PFU. Dissemination of virus to the hemocoel was time dependent. Virus was disseminated in only 34% (23/68) of the infected mosquitoes after 5–9 d incubation, compared with 76% (22/29) in those held 26 or more days after the infectious blood meal. Infection and dissemination rates were similar for mosquitoes exposed orally to either an Egyptian (ZH501) or a central African (ArB 1976) strain of RVF virus. Likewise, transmission rates (53%, 50/94) and viral titers (mean = 105.4 PFU) were similar for Ae. fowleri inoculated with either viral strain. Mosquitoes with a disseminated infection after oral exposure transmitted virus during 43% (13/30) of the refeedings. We conclude that Ae. fowleri should be considered as a potential vector of RVF virus.Keywords
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