Temporally consistent predominance and distribution of secondary malaria vectors in the Anopheles community of the upper Zambezi floodplain.
Temporally consistent predominance and distribution of secondary malaria vectors in the Anopheles community of the upper Zambezi floodplain.
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DOI：
10.1038/s41598-021-04314-4
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发表时间：
2022-01-07
影响因子：
4.6
通讯作者：
Shaw PW
中科院分区：
文献类型：
--
作者：
Cross DE;Healey AJE;McKeown NJ;Thomas CJ;Macarie NA;Siaziyu V;Singini D;Liywalii F;Sakala J;Silumesii A;Shaw PW
疟疾病媒控制方法的区域优化需要详细了解按蚊群落的物种组成以及它们在空间和时间尺度上的变化。在生态水文条件季节性和年际波动的环境中，如赞比西河上游的Barotse洪泛区，有关病媒群落动态的知识尤为重要。2019年雨季采样的按蚊幼虫的DNA条形码显示次级媒介物种占主导地位，coustani包括> 80%的采样幼虫，并普遍分布在所有生态区。广泛的幼虫采样，再加上一个较小的调查成年蚊子，确定了地理集群的主要载体，但只占2%的按蚊幼虫。与2017/2018年的幼虫调查和同期独立的5年成虫诱捕数据集的比较证实了多年来主要媒介的缺乏，以及An的一致数量优势。尽管水文条件年际间变化很大，但在旱季和雨季都能监测到库斯坦病媒和其他次级病媒的传播。空间分布和按蚊群落组成的这种显著的时间一致性提供了一个机会，以针对户外主要的次级媒介。在采取多种病媒控制办法的同时，应考虑对幼虫来源进行管理，以更有效地防治疟疾的残余传播。
Regional optimisation of malaria vector control approaches requires detailed understanding both of the species composition of Anopheles mosquito communities, and how they vary over spatial and temporal scales. Knowledge of vector community dynamics is particularly important in settings where ecohydrological conditions fluctuate seasonally and inter-annually, such as the Barotse floodplain of the upper Zambezi river. DNA barcoding of anopheline larvae sampled in the 2019 wet season revealed the predominance of secondary vector species, with An. coustani comprising > 80% of sampled larvae and distributed ubiquitously across all ecological zones. Extensive larval sampling, plus a smaller survey of adult mosquitoes, identified geographic clusters of primary vectors, but represented only 2% of anopheline larvae. Comparisons with larval surveys in 2017/2018 and a contemporaneous independent 5-year dataset from adult trapping corroborated this paucity of primary vectors across years, and the consistent numerical dominance of An. coustani and other secondary vectors in both dry and wet seasons, despite substantial inter-annual variation in hydrological conditions. This marked temporal consistency of spatial distribution and anopheline community composition presents an opportunity to target predominant secondary vectors outdoors. Larval source management should be considered, alongside prevalent indoor-based approaches, amongst a diversification of vector control approaches to more effectively combat residual malaria transmission.
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DOI：
10.1093/infdis/jiab084
发表时间：
2021-04-27
期刊：
The Journal of infectious diseases
影响因子：
--
作者：
Carnevale P;Manguin S
通讯作者：
Manguin S
影响因子：
1.2
作者：
Del Rio T;Groot JCJ;DeClerck F;Estrada-Carmona N
通讯作者：
Estrada-Carmona N
影响因子：
2.1
作者：
Fornadel, Christen M.;Norris, Laura C.;Norris, Douglas E.
通讯作者：
Norris, Douglas E.
影响因子：
16.6
作者：
Chemison A;Ramstein G;Tompkins AM;Defrance D;Camus G;Charra M;Caminade C
通讯作者：
Caminade C
DOI：
10.3390/ijerph18147255
发表时间：
2021-07-07
影响因子：
--
作者：
Agyekum TP;Botwe PK;Arko-Mensah J;Issah I;Acquah AA;Hogarh JN;Dwomoh D;Robins TG;Fobil JN
通讯作者：
Fobil JN