Talipouo Abdou, Doumbe-Belisse Patricia, Ngadjeu Carmène S, Djamouko-Djonkam Landre, Nchoutpouen Elysée, Bamou Roland, Sonhafouo-Chiana Nadège, Mayi Audrey Paul Marie, Dadji Foko Gisèle Aurélie, Awono-Ambene Parfait, Kekeunou Sévilor, Wondji Charles S, Antonio-Nkondjio Christophe
Institut de Recherche de Yaoundé (IRY), Organisation de Coordination pour la lutte Contre les Endémies en Afrique Centrale (OCEAC), P.O. Box 288, Yaoundé, Cameroon.
Faculty of Sciences, University of Yaoundé I, P.O. Box 337, Yaoundé, Cameroon.
Curr Res Parasitol Vector Borne Dis. 2023 Jul 28;4:100136. doi: 10.1016/j.crpvbd.2023.100136. eCollection 2023.
Although species are considered to be equally affected by control measures targeting malaria vectors, there is still not enough evidence of the impact of interventions such as larviciding on the distribution of these mosquito species. The present study assessed the impact of a larviciding trial targeting malaria vectors on mosquito species in the city of Yaoundé, Cameroon. A cluster randomized trial comparing 13 treated clusters and 13 untreated clusters was implemented. Data were collected at baseline and during the larviciding intervention, from March 2017 to November 2020. The microbial larvicide VectoMax G was applied once every 2 weeks in the intervention areas. Adult mosquitoes were collected using CDC light traps in both intervention and non-intervention areas and compared between arms. Globally, larviciding intervention was associated with 69% reduction in aquatic habitats with larvae and 36.65% reduction of adult densities in houses. Adult densities were reduced both indoors (35.26%) and outdoors (42.37%). No change in the composition of species was recorded. The study suggests a high impact of larviciding on mosquito species distribution. The impact of the intervention can be improved if typical breeding habitats including pit latrines are targeted.
尽管人们认为物种受到针对疟疾媒介的控制措施的影响程度相同，但对于杀幼虫剂等干预措施对这些蚊虫物种分布的影响，仍没有足够的证据。本研究评估了喀麦隆雅温得市一项针对疟疾媒介的杀幼虫剂试验对蚊虫物种的影响。实施了一项整群随机试验，比较13个处理组和13个未处理组。在2017年3月至2020年11月期间的基线期和杀幼虫剂干预期间收集数据。在干预地区每两周施用一次微生物杀幼虫剂VectoMax G。在干预区和非干预区使用疾控中心诱蚊灯收集成年蚊子，并在两组之间进行比较。总体而言，杀幼虫剂干预使有幼虫的水生栖息地减少了69%，房屋内成年蚊子密度降低了36.65%。室内（35.26%）和室外（42.37%）的成年蚊子密度均有所降低。未记录到物种组成的变化。该研究表明杀幼虫剂对蚊虫物种分布有很大影响。如果将包括坑式厕所在内的典型繁殖栖息地作为目标，干预效果可以得到改善。
