BACKGROUND Southeast Brazil has recently experienced a Yellow Fever virus (YFV) outbreak where the mosquito Haemagogus leucocelaenus was a primary vector. Climatic factors influence the abundance of mosquito vectors and arbovirus transmission. OBJECTIVES We aimed at describing the population dynamics of Hg. leucocelaenus in a county touched by the recent YFV outbreak. METHODS Fortnightly egg collections with ovitraps were performed from November 2012 to February 2017 in a forest in Nova Iguaçu, Rio de Janeiro, Brazil. The effects of mean temperature and rainfall on the Hg. leucocelaenus population dynamics were explored. FINDINGS Hg. leucocelaenus eggs were continuously collected throughout the study, with a peak in the warmer months (December-March). The climatic variables had a time-lagged effect and four weeks before sampling was the best predictor for the positivity of ovitraps and total number of eggs collected. The probability of finding > 50% positive ovitraps increased when the mean temperature was above 24ºC. The number of Hg. leucocelaenus eggs expressively increase when the mean temperature and accumulated precipitation surpassed 27ºC and 100 mm, respectively, although the effect of rainfall was less pronounced. MAIN CONCLUSIONS Monitoring population dynamics of Hg. leucocelaenus and climatic factors in YFV risk areas, especially mean temperature, may assist in developing climate-based surveillance procedures to timely strengthening prophylaxis and control.

中文翻译：

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在巴西东南部的大西洋森林中，主要的黄热病传播媒介白毛线虫（Dyar和Shannon）（双翅目：Culicidae）的季节性种群动态主要受温度影响。

背景技术巴西东南部最近经历了黄热病病毒（YFV）爆发，其中蚊子嗜血杆菌（Haemagogus leucocelaenus）是主要媒介。气候因素影响蚊媒的数量和虫媒病毒的传播。目的我们旨在描述汞的种群动态。最近因YFV爆发而感动的县城白带。方法自2012年11月至2017年2月，在巴西里约热内卢的新伊瓜苏（NovaIguaçu）的森林中进行了每两周带卵子卵的收集工作。平均温度和降雨对汞的影响。探索白带菌种群动态。结果汞。在整个研究过程中不断收集白卵卵，在温暖的月份（12月至3月）达到峰值。气候变量具有时滞效应，采样前四周是产卵器阳性和卵收集总数的最佳预测指标。当平均温度高于24ºC时，发现> 50％阳性产卵器的可能性增加。汞数 当平均温度和累积降水分别超过27ºC和100 mm时，白卵的表达显着增加，尽管降雨的影响并不明显。主要结论监测汞的种群动态。YFV危险区域的白带和气候因素，尤其是平均温度，可能有助于制定基于气候的监视程序，以适时加强预防和控制。当平均温度高于24ºC时，有50％的阳性产卵器增加。汞数 当平均温度和累积降水量分别超过27ºC和100 mm时，白eggs卵显着增加，尽管降雨的影响并不明显。主要结论监测汞的种群动态。YFV危险区域的白带和气候因素，尤其是平均温度，可能有助于制定基于气候的监视程序，以适时加强预防和控制。当平均温度高于24ºC时，有50％的阳性产卵器增加。汞数 当平均温度和累积降水量分别超过27ºC和100 mm时，白eggs卵显着增加，尽管降雨的影响并不明显。主要结论监测汞的种群动态。YFV危险区域的白带和气候因素，尤其是平均温度，可能有助于制定基于气候的监视程序，以适时加强预防和控制。