科研之友
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摘要
West Nile virus (WNV) perpetuates in all enzootic transmission cycle involving Culex mosquitoes and virus-a avian hosts. In the northeastern United States, the enzootic vectors, Cx. pipiens a rid Cx. restuans, feed preferentially oil American robins (Turdus migratorius), suggesting a key role for this bird species in the WNV transmission cycle. We examined the role of American robin communal roosts as virus amplification foci ill greater New Haven, Connecticut. Robin communal roosts were located by radio tracking. After mid-August when most robins were using the roosts. Cx. pipiens and Cx. restuans fed often oil robins and were significantly more infected with WNV at communal roosts than at non-roosting sites. We also identified 6.4% human-derived blood meals in Aedes vexans in communal roosts. Our results indicate that communal roosts act as late-season amplification foci facilitating transmission to humans because of high infection rates, high abundance, and feeding patterns of enzootic and bridge vectors.
- 出版日期2010-2
