Potential for Psorophora columbiae and Psorophora ciliata Mosquitoes (Diptera: Culicidae) to Transmit Rift Valley Fever Virus

Journal of Medical Entomology
M J TurellKenneth J Linthicum

Abstract

Rift Valley fever virus (RVFV) continues to pose a threat to much of the world. Unlike many arboviruses, numerous mosquito species have been associated with RVFV in nature, and many species have been demonstrated as competent vectors in the laboratory. In this study, we evaluated two field-collected Psorophora species, Psorophora columbiae (Dyar and Knab) and Psorophora ciliata (F.) for their potential to transmit RVFV in North America. Both species were susceptible to infection after feeding on a hamster with a viremia of 10(7) plaque-forming units/ml, with infection rates of 65 and 83% for Ps. columbiae and Ps. ciliata, respectively (with nearly all specimens becoming infected when feeding on a hamster with a higher viremia). However, both species had a significant salivary gland barrier, as only 2/35 Ps. columbiae and 0/3 Ps. ciliata with a disseminated infection transmitted virus by bite. Despite the presence of the salivary gland barrier, due to the very high population that can occur and its propensity to feed on large mammals, Ps. columbiae might play a role in amplifying RVFV should that virus be introduced into an area where this species is common.

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Citations

Mar 18, 2016·Annual Review of Entomology·Kenneth J LinthicumAssaf Anyamba
Sep 20, 2017·Vaccines·Bonto FaburayJuergen A Richt
Mar 28, 2018·Health Security·Tammy R BeckhamJoshua B Fine
Dec 14, 2018·Viruses·Andrea L KroekerHana Weingartl
Feb 14, 2017·Transboundary and Emerging Diseases·A J GolnarG L Hamer
Nov 15, 2018·Virus Genes·Natasha N GaudreaultJuergen A Richt

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