Invasion of Wolbachia at the residential block level is associated with local abundance of Stegomyia aegypti, yellow fever mosquito, populations and property attributes
Invasion of Wolbachia at the residential block level is associated with local abundance of Stegomyia aegypti, yellow fever mosquito, populations and property attributes
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DOI：
10.1111/mve.12077
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发表时间：
2014-08-01
影响因子：
1.9
通讯作者：
Ritchie, S. A.
中科院分区：
文献类型：
--
作者：
Hoffmann, A. A.;Goundar, A. A.;Ritchie, S. A.
沃尔巴克氏体可以抑制登革热并控制蚊子种群，这取决于感染沃尔巴克氏体的蚊子能否成功入侵当地种群。最近感染 wMel 的埃及隐蝇（双翅目：蚊科）（林奈）入侵澳大利亚凯恩斯附近的戈登维尔期间收集的产卵器数据被用来确定有助于预测局部入侵成功与否的变量。根据戈登维尔以及约克斯诺布另一个释放地点的沃尔巴克氏体频率与模拟结果的差异，估计平均有 2-4 只雌性向产卵器产卵。通过整理住宅区释放开始时两个收集期的产卵器数据，发现未受感染的蚊子在释放地点的分布不均匀。未感染蚊子数量相对较高的住宅区比数量较少的住宅区更不容易被沃尔巴克氏体入侵。产卵器中未感染蚊子的数量与住宅区砖房的比例呈负相关，而当地沃尔巴克氏体频率与该变量呈正相关，与院子的遮荫量和繁殖地点的可用性呈负相关。这些发现指出了预测沃尔巴克氏体局部入侵难易程度的替代措施。
Wolbachia can suppress dengue and control mosquito populations and this depends on the successful invasion of Wolbachia-infected mosquitoes into local populations. Ovitrap data collected during the recent invasion of wMel-infected Stegomyia aegypti (Diptera: Culicidae) (Linnaeus) into Gordonvale near Cairns, Australia, were used to identify variables that help predict the success of localized invasion. Based on the variance in Wolbachia frequencies across Gordonvale as well as at another release site at Yorkeys Knob in comparison to simulations, it was estimated that on average 2-4 females contributed eggs to an ovitrap. By collating ovitrap data from two collection periods at the start of the release from residential blocks, it was found that uninfected mosquitoes had a patchy distribution across the release site. Residential blocks with relatively high uninfected mosquito numbers were less easily invaded by Wolbachia than blocks with low numbers. The numbers of uninfected mosquitoes in ovitraps were negatively correlated with the proportion of brick houses in a residential block, whereas local Wolbachia frequencies were correlated positively with this variable as well as negatively with the amount of shading in a yard and availability of breeding sites. These findings point to proxy measures for predicting the ease of localized invasion of Wolbachia.