RAINFALL-DIRECTED OVIPOSITION BEHAVIOR OF CULEX-NIGRIPALPUS (DIPTERA, CULICIDAE) AND ITS INFLUENCE ON ST-LOUIS ENCEPHALITIS-VIRUS TRANSMISSION IN INDIAN RIVER COUNTY, FLORIDA
RAINFALL-DIRECTED OVIPOSITION BEHAVIOR OF CULEX-NIGRIPALPUS (DIPTERA, CULICIDAE) AND ITS INFLUENCE ON ST-LOUIS ENCEPHALITIS-VIRUS TRANSMISSION IN INDIAN RIVER COUNTY, FLORIDA
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DOI：
10.1093/jmedent/27.1.43
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发表时间：
1990-01-01
影响因子：
2.1
通讯作者：
EDMAN, JD
中科院分区：
文献类型：
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作者：
DAY, JF;CURTIS, GA;EDMAN, JD
在弗拉州的印第安河县，从1985年1月到1987年12月对每次采集的绿色（新出现）、空的、吸血的和妊娠的雌性数量进行计数;解剖多达100只空的雌性，以估计种群中空的、经产的雌性的丰度。一般来说，这一物种在1月至6月的旱季不常见，但在7月的雨季增加，并在初冬保持丰富。在潮湿的季节，绿色，生产，和怀孕的女性周期性丰富。时间序列分析表明，绿色和经产蚊子正相关，通过时间和怀孕的女性与日降雨量呈负相关。1985年记录了最强的相关性，在这一年中，圣路易斯脑炎病毒在印第安河县的检出频率增加。在一个大型的室外风洞实验室实验证实，高相对湿度是重要的启动和成功完成产卵的妊娠，现场收集的Cx。黑须蚊因此，秋季的间歇性降雨可能有助于推迟产卵，延长寿命，同步吸血，并增强圣路易斯脑炎病毒通过受感染蚊子在野外的传播。
Resting Culex nigripalpus Theobald were collected with a ground aspirator three times a week in Indian River County, Fla., from January 1985 through December 1987. The number of green (newly emerged), empty, blood-fed, and gravid females in each collection was counted; up to 100 empty females were dissected to estimate the abundance of empty, parous females in the population. In general, this species was uncommon during the dry season from January through June but increased during the wet season in July and remained abundant through early winter. During the wet season, green, parous, and gravid females were periodically abundant. Time series analysis demonstrated that green and parous mosquitoes were positively associated through time and that gravid females were associated negatively with daily rainfall. The strongest correlations were recorded in 1985, a year during which St. Louis encephalitis virus was detected with increased frequency in Indian River County. Laboratory experiments in a large outdoor wind tunnel confirmed that high relative humidity was important for the initiation and successful completion of oviposition by gravid, field-collected Cx. nigripalpus mosquitoes. Thus, intermittent rainfall during autumn may serve to delay oviposition, increase longevity, synchronize blood feeding, and enhance transmission of St. Louis encephalitis virus by infected mosquitoes in the field.