Department of Entomology, Louisiana State University Agricultural Center, 404 Life Sciences Bldg., Baton Rouge, LA 70803, USA.
J Med Entomol. 2010 Mar;47(2):238-48. doi: 10.1603/me09168.
Host feeding patterns were examined for four species of Culex mosquitoes collected from 18 sites in or adjacent to East Baton Rouge Parish, LA, from November 2002 to October 2004. Host DNA from 37 bloodfed Culex coronator Dyar and Knab, 67 bloodfed Cx. salinarius Coquillett, 112 bloodfed Cx. nigripalpus Theobald, and 684 bloodfed Cx. quinquefasciatus Say were identified. The percentages of bloodmeals containing mammalian DNA were 94.6% for Cx. coronator, 82.1% for Cx. salinarius, 66.1% for Cx. nigripalpus, and 40.1% for Cx. quinquefasciatus. Human DNA was detected in 7% of the bloodmeals from Cx. quinquefasciatus and 2.7% of the bloodmeals from Cx. nigripalpus. The northern cardinal was the most frequent avian host of Cx. quinquefasciatus and Cx. nigripalpus. In 2003 and 2004, there was no significant relationship from May through October between the proportion of Cx. quinquefasciatus feeding on mammalian hosts and the date of collection. Of the six avian species most frequently fed on by Cx. quinquefasciatus, the northern cardinal, northern mockingbird, common grackle, and brown thrasher were fed on more frequently than expected based on their abundance. House sparrows were fed on less frequently than expected based on their abundance. These data support the conclusions of previous studies that Cx. quinquefasciatus is the most important vector for both the enzootic amplification and transmission of West Nile virus to humans in southern Louisiana.
对 2002 年 11 月至 2004 年 10 月从路易斯安那州东巴吞鲁日教区或其附近的 18 个地点采集的 4 种库蚊进行了宿主摄食模式研究。从 37 只吸食库蚊 coronator Dyar 和 Knab 的血液、67 只吸食库蚊 salinarius Coquillett 的血液、112 只吸食库蚊 nigripalpus Theobald 的血液和 684 只吸食库蚊 quinquefasciatus Say 的血液中鉴定出了宿主 DNA。含哺乳动物 DNA 的血餐百分比分别为库蚊 coronator 的 94.6%、库蚊 salinarius 的 82.1%、库蚊 nigripalpus 的 66.1%和库蚊 quinquefasciatus 的 40.1%。在库蚊 quinquefasciatus 的 7%的血餐和库蚊 nigripalpus 的 2.7%的血餐中检测到了人类 DNA。北红雀是库蚊 quinquefasciatus 和库蚊 nigripalpus 最常摄食的鸟类宿主。2003 年和 2004 年，5 月至 10 月间，库蚊 quinquefasciatus 以哺乳动物为食的比例与采集日期之间没有显著关系。在库蚊 quinquefasciatus 最常摄食的 6 种鸟类中，北红雀、北嘲鸫、普通乌鸦和褐噪鹛的摄食频率高于根据其丰度预期的频率。麻雀的摄食频率低于根据其丰度预期的频率。这些数据支持了之前的研究结论，即库蚊 quinquefasciatus 是南方路易斯安那州西尼罗河病毒在动物间传播和向人类传播的最重要媒介。
