Translator Disclaimer
1 November 2003 Vertical Transmission of West Nile Virus by Three California Culex (Diptera: Culicidae) Species
Author Affiliations +
Abstract

Three California Culex species previously identified as efficient laboratory vectors of West Nile (WN) virus were tested for their capability to vertically transmit WN virus. Wild-caught Culex pipiens pipiens L., Culex pipiens quinquefasciatus Say, and two populations of Culex tarsalis Coquillett females were inoculated intrathoracically with 102.7 ± 0.1 plaque-forming units of WN virus. F1 progeny were reared at 18°C and subsequently tested as adults for infectious virus on Vero cell culture. Virus was not detected in 197 pools comprising 4,884 Cx. p. pipiens. The minimum filial infection rate (MFIR) for Cx. p. quinquefasciatus was ≈3.0/1,000 for 665 progeny tested in 28 pools. There was no virus detected in 102 pools of 2,453 progeny from Cx. tarsalis collected in Riverside County. The MFIR for Cx. tarsalis collected in Yolo County was ≈ 6.9/1,000 for 2,165 progeny tested in 86 pools. Mosquito progeny infected vertically during the fall could potentially serve as a mechanism for WN virus to overwinter and initiate horizontal transmission the following spring.

Laura B. Goddard, Amy E. Roth, William K. Reisen, and Thomas W. Scott "Vertical Transmission of West Nile Virus by Three California Culex (Diptera: Culicidae) Species," Journal of Medical Entomology 40(6), 743-746, (1 November 2003). https://doi.org/10.1603/0022-2585-40.6.743
Received: 22 April 2003; Accepted: 1 August 2003; Published: 1 November 2003
JOURNAL ARTICLE
4 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top