2003年至2006年德克萨斯州哈里斯县两个蚊子种群与西尼罗河病毒之间的关联
Associations between two mosquito populations and West Nile virus in Harris County, Texas, 2003-06.
作者信息
Dennett James A, Bala Adilelkhidir, Wuithiranyagool Taweesak, Randle Yvonne, Sargent Christopher B, Guzman Hilda, Siirin Marina, Hassan Hassan K, Reyna-Nava Martin, Unnasch Thomas R, Tesh Robert B, Parsons Ray E, Bueno Rudy
机构信息
Harris County Public Health and Environmental Services, Mosquito Control Division, 3330 Old Spanish Trail, Building D, Houston, TX 77021, USA.
出版信息
J Am Mosq Control Assoc. 2007 Sep;23(3):264-75. doi: 10.2987/8756-971X(2007)23[264:ABTMPA]2.0.CO;2.
Associations between Culex quinquefasciatus, Aedes albopictus and West Nile virus (WNV) activity, temperature, and rainfall in Harris County, Texas 2003-06 are discussed. Human cases were highly correlated to Cx. quinquefasciatus (r = 0.87) and Ae. albopictus (r = 0.78) pools, blue jays (r = 0.83), and Ae. albopictus collected (r = 0.71), but not Cx. quinquefasciatus collected (r = 0.45). Human cases were associated with temperature (r = 0.71), not rainfall (r = 0.29), whereas temperature correlated with Ae. albopictus and Cx. quinquefasciatus collections (r = 0.88 and 0.70, respectively) and Cx. quinqueftsciatus pools (r = 0.75), but not Ae. albopictus pools (r = 0.55). Both species (collections and pools) and blue jays were weakly correlated (r 5 0.41) with rainfall, but blue jays were better correlated with Cx. quinquefasciatus pools (r = 0.87), compared with Ae. albopictus pools (r = 0.67), Ae. albopictus collections (r = 0.69), and Cx. quinquefasciatus collections (r = 0.46). Peak minimum infection rate for Cx. quinquefasciatus (4.55), and Ae. albopictus (4.41) was in August with highest human cases (17.87), blue jays (55.58), and temperature (29.01 degrees C). Between both species, blood meal analysis indicated 68.18% of Cx. quinquefasciatus mammalian hosts were dog, while 22.72% were human, whereas Ae. albopictus had higher human (44.44%) but fewer dog hosts (22.22%). Ten bird species were identified as hosts for Cx. quinquefasciatus, with northern cardinal and blue jay representing 26.66% and 20.00%, respectively. No bird feeding activity was observed in Ae. albopictus. The earliest and latest human blood meal occurred in May (Ae. albopictus) and November (Cx. quinquefasciatus); 66.66% of human host identifications between both species occurred in October-November, after the seasonal human case peak. Based upon our data, WNV activity in both mosquito species warrants further investigation of their individual roles in WNV ecology within this region.
本文讨论了2003 - 2006年得克萨斯州哈里斯县库蚊、白纹伊蚊与西尼罗河病毒（WNV）活动、温度和降雨之间的关联。人类病例与致倦库蚊（r = 0.87）、白纹伊蚊（r = 0.78）样本、冠蓝鸦（r = 0.83）以及捕获的白纹伊蚊（r = 0.71）高度相关，但与捕获的致倦库蚊（r = 0.45）相关性不强。人类病例与温度（r = 0.71）相关，与降雨量（r = 0.29）无关，而温度与白纹伊蚊和致倦库蚊的捕获量（分别为r = 0.88和0.70）以及致倦库蚊样本（r = 0.75）相关，但与白纹伊蚊样本（r = 0.55）无关。两种蚊子（样本和捕获量）以及冠蓝鸦与降雨量的相关性较弱（r = 0.41），但冠蓝鸦与致倦库蚊样本（r = 0.87）的相关性优于白纹伊蚊样本（r = 0.67）、捕获的白纹伊蚊（r = 0.69）和捕获的致倦库蚊（r = 0.46）。致倦库蚊（4.55）和白纹伊蚊（4.41）的最低感染率峰值出现在8月，此时人类病例数最高（17.87）、冠蓝鸦数量最多（55.58）、温度最高（29.01摄氏度）。在两种蚊子中，血餐分析表明，致倦库蚊的哺乳动物宿主中68.18%是狗，22.72%是人类，而白纹伊蚊的人类宿主比例更高（44.44%），狗宿主比例更低（22.22%）。已确定10种鸟类是致倦库蚊的宿主，其中北美红雀和冠蓝鸦分别占26.66%和20.00%。未观察到白纹伊蚊有鸟类吸食行为。人类最早和最晚的血餐分别出现在5月（白纹伊蚊）和11月（致倦库蚊）；两种蚊子中66.66%的人类宿主鉴定发生在10 - 11月，在季节性人类病例峰值之后。基于我们的数据，两种蚊子中的WNV活动值得进一步研究它们在该地区WNV生态中的各自作用。
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