Vector Competence of Senegalese Aedes fowleri (Diptera: Culicidae) for Rift Valley Fever Virus

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 10 to the 1.3-1.6 power plaque-forming units (PFU) of virus to 89% (206/231) for those...

Full description

Saved in:
Bibliographic Details
Main Authors: Turell, Michael J, Faran, Michael E, Cornet, Michel, Bailey, Charles L
Format: Report
Language:English
Subjects:
AEDES
AEDES FOWLERI
AFRICA
Biology
BLOOD
CULICIDAE
DIPTERA
DISEASE VECTORS
DISTRIBUTION
EXPOSURE(PHYSIOLOGY)
INFECTIOUS DISEASE TRANSMISSION
INFECTIOUS DISEASES
MEALS
Medicine and Medical Research
ORAL INTAKE
PROPAGATION
RATES
REPRINTS
RIFT VALLEY FEVER
RIFT VALLEY FEVER VIRUS
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 10 to the 1.3-1.6 power plaque-forming units (PFU) of virus to 89% (206/231) for those ingesting or = 10 to the 6.4 power 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 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 = 10 to the 5.4 power PVF) 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: Infectious disease transmission, Reprints. (AU) Availability: Pub. in Jnl. of Medical Entomology, v25 n4 p262-266 1988. No copies furnished by DTIC/NTIS.