Distribution and breeding sites of Aedes aegypti and Aedes albopictus in 32 urban/peri-urban districts of Mozambique: implication for assessing the risk of arbovirus outbreaks
Distribution and breeding sites of Aedes aegypti and Aedes albopictus in 32 urban/peri-urban districts of Mozambique: implication for assessing the risk of arbovirus outbreaks
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DOI：
10.1371/journal.pntd.0006692
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发表时间：
2018-09-01
影响因子：
3.8
通讯作者：
Gudo, Eduardo Samo
中科院分区：
文献类型：
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作者：
Abilio, Ana Paula;Abudasse, Gastao;Gudo, Eduardo Samo
背景伊蚊传播的虫媒病毒已成为世界范围内一个重要的公共卫生问题，在莫桑比克，病例数量及其地理传播不断增加。然而，关于埃及伊蚊和伊蚊的发生、分布和生态的信息。白纹伊蚊在该国仍鲜为人知。方法2016年3月至4月，在莫桑比克32个地区进行了一项横断面研究，以确定白纹伊蚊的分布和繁殖地。埃及伊蚊和伊蚊。白纹伊蚊。根据容器类型和位置，使用移液器、铲子、漏斗和清扫程序从总共 2,807 个盛水容器中收集幼虫和蛹。检查了室外和室内的盛水容器。将未成熟型饲养至成虫，并利用体视显微镜利用分类学索引对蚊种进行鉴定。结果各采样区均发现埃及伊蚊，而白伊蚊为蚊种。白纹伊蚊仅在位于该国中部太特省的莫阿蒂泽地区发现。 2,807 个容器中，有 628 个（22.4%）AE 呈阳性。埃及伊蚊，但只有 1 只 (0.03%) 呈伊蚊阳性。白纹伊蚊。中部地区人口密集的郊区的伊蚊容器指数（CI）最高（260/604；43.0%），其次是北部地区的郊区（228/617；36.9%），南部城市化地区的比例最低（140/1586；8.8%）。伊蚊置信区间最高的是旧轮胎（448/1268；35.3%）、水泥罐（20/62；32.3%）和桶（21/95；22.1%）。结论我们的研究数据表明，伊蚊。埃及伊蚊在全国范围内存在，因为它出现在每个样本地区，而伊蚊则在全国范围内存在。白纹伊蚊的分布有限。因此，登革热和基孔肯雅热在莫桑比克的传播风险可能被低估。这项研究强调了建立国家伊蚊昆虫学监测计划的必要性。莫桑比克，以便更好地了解媒介生物学并支持制定知情有效的媒介控制策略。
BackgroundAedes-borne arboviruses have emerged as an important public health problem worldwide and, in Mozambique, the number of cases and its geographical spread have been growing. However, information on the occurrence, distribution and ecology of Aedes aegypti and Ae. albopictus mosquitoes remain poorly known in the country.MethodsBetween March and April 2016, a cross-sectional study was conducted in 32 districts in Mozambique to determine the distribution and breeding sites of Ae. aegypti and Ae. albopictus. Larvae and pupae were collected from a total of 2,807 water-holding containers using pipette, dipper, funnel and sweeping procedures, depending on the container type and location. Both outdoor and indoor water-holding containers were inspected. The immature forms were reared to adults and the identifications of the mosquito species was carried out with a stereomicroscope using a taxonomic key.ResultsAedes aegypti was found in every district sampled, while Ae. albopictus was only found in Moatize district, situated in Tete Province in the central part of the country. Six hundred and twenty-eight of 2,807 (22.4%) containers were positive for Ae. aegypti but only one (0.03%) was positive for Ae. albopictus. The Container Index (CI) of Aedes was highest in densely populated suburban areas of the central region (260/604; 43.0%), followed by suburban areas in northern areas (228/617; 36.9%) whilst the lowest proportion was found in urbanized southern areas (140/1586; 8.8%). The highest CI of Aedes was found in used tires (448/1268; 35.3%), cement tanks (20/62; 32.3%) and drums (21/95; 22.1%).ConclusionData from our study showed that Ae. aegypti is present nation-wide, since it occurred in every sampled district, whilst Ae. albopictus had a limited distribution. Therefore, the risk of transmission of dengue and chikungunya is likely to have been underestimated in Mozambique. This study highlights the need for the establishment of a national entomological surveillance program for Aedes spp. in Mozambique in order to gain a better understanding about vector bionomics and to support the development of informed effective vector control strategies.