Vector competence of Australian mosquito species for a North American strain of West Nile virus

Jansen, Cassie C., Webb, Cameron, Northill, Judith A., Ritchie, Scott A., Russell, Richard C., and Van Den Hurk, Andrew F. (2008) Vector competence of Australian mosquito species for a North American strain of West Nile virus. Vector Borne and Zoonotic Diseases, 8 (6). pp. 805-811.

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Abstract

Since the establishment of West Nile virus (WNV) into the United States, concern has arisen that this virus may also pose a serious threat to Australian biosecurity. The vector competence of 19 Australian mosquito species for a North American strain of WNV was evaluated. Mosquitoes collected from Cairns, Brisbane, and Sydney were exposed to blood containing 104.0±0.3 cell culture infectious dose50/mosquito WNV that was isolated from a crow during the 1999 New York outbreak. Mosquitoes were tested 12–15 days later to determine their infection, dissemination, and transmission rates. A number of Culex spp. demonstrated a high vector competence for this virus, with some populations of Culex annulirostris, the primary Australian Kunjin virus vector, displaying transmission rates up to 84%. Similarly, Cx. quinquefasciatus and Cx. gelidus were highly competent, with infection and transmission rates of >80% and >50%, respectively. Common Aedes spp., including Aedes notoscriptus, Ae. vigilax, and Ae. procax, were moderately susceptible, and some Verrallina spp. and Coquillettidia spp. were relatively refractory to infection. Thus, Australia possesses a number of competent mosquito species that could facilitate local transmission of WNV, should it be introduced.

Item ID: 7238
Item Type: Article (Research - C1)
ISSN: 1557-7759
Keywords: mosquito transmission; arbovirus; culex; mosquito(es); West Nile; vector
Date Deposited: 25 Mar 2010 03:56
FoR Codes: 11 MEDICAL AND HEALTH SCIENCES > 1117 Public Health and Health Services > 111799 Public Health and Health Services not elsewhere classified @ 50%
11 MEDICAL AND HEALTH SCIENCES > 1108 Medical Microbiology > 110804 Medical Virology @ 50%
SEO Codes: 92 HEALTH > 9204 Public Health (excl. Specific Population Health) > 920404 Disease Distribution and Transmission (incl. Surveillance and Response) @ 50%
92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920109 Infectious Diseases @ 50%
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