Division of Vector-Borne Diseases, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Fort Collins, CO 80521, USA.
Am J Trop Med Hyg. 2013 May;88(5):986-96. doi: 10.4269/ajtmh.12-0109. Epub 2013 Mar 11.
A study of West Nile virus (WNV) ecology was conducted in St. Tammany Parish, Louisiana, from 2002 to 2004. Mosquitoes were collected weekly throughout the year using Centers for Disease Control and Prevention (CDC) light traps placed at 1.5 and 6 m above the ground and gravid traps. A total of 379,466 mosquitoes was collected. WNV was identified in 32 pools of mosquitoes comprising four species; 23 positive pools were from Culex nigripalpus collected during 2003. Significantly more positive pools were obtained from Cx. nigripalpus collected in traps placed at 6 m than 1.5 m that year, but abundance did not differ by trap height. In contrast, Cx. nigripalpus abundance was significantly greater in traps placed at 6 m in 2002 and 2004. Annual temporal variation in Cx. nigripalpus peak seasonal abundance has important implications for WNV transmission in Louisiana. One WNV-positive pool, from Cx. erraticus, was collected during the winter of 2004, showing year-round transmission. The potential roles of additional mosquito species in WNV transmission in southeastern Louisiana are discussed.
一项关于西尼罗河病毒（WNV）生态学的研究于 2002 年至 2004 年在路易斯安那州圣坦曼尼教区进行。全年每周使用美国疾病控制与预防中心（CDC）放置在离地 1.5 和 6 米高的诱蚊灯和诱卵器收集蚊子。共收集到 379466 只蚊子。从 2003 年收集的四种蚊子中，有 32 个蚊子池中发现了 WNV；其中 23 个阳性池来自库蚊黑带亚种。当年，从 6 米高的诱蚊器中收集到的阳性蚊子池数量明显多于离地 1.5 米的诱蚊器，但诱蚊器高度的丰度没有差异。相比之下，2002 年和 2004 年，6 米高诱蚊器中的库蚊黑带亚种数量明显更多。库蚊黑带亚种季节性丰度的年度时间变化对路易斯安那州的 WNV 传播有重要影响。2004 年冬季，从库蚊不稳定亚种中收集到一个WNV 阳性池，表明全年都有传播。此外，还讨论了东南路易斯安那州其他蚊子种类在 WNV 传播中的潜在作用。
