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Ixodid and Argasid Tick Species and West Nile Virus
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Apr 2004
Source: Emerg Infect Dis. 10(4):653-657.
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Alternative Title:Emerg Infect Dis
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Description:Control of West Nile virus (WNV) can only be effective if the vectors and reservoirs of the virus are identified and controlled. Although mosquitoes are the primary vectors, WNV has repeatedly been isolated from ticks. Therefore tick-borne transmission studies were performed with an ixodid (|) and an argasid tick species (|). Both species became infected after feeding upon viremic hosts, but | ticks were unable to maintain the virus. In contrast, | ticks were infected for at least 132 days, and the infection was maintained through molting and a second bloodmeal. Infected | ticks transmitted the virus to rodent hosts, albeit at a low level. Moreover, the virus was nonsystemically transmitted between infected and uninfected | ticks co-fed upon uninfected hosts. Although ticks are unlikely to play a major role in WNV transmission, our findings suggest that some species have the potential to act as reservoirs for the virus.
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