Konkon Alphonse Keller, Zoungbédji David Mahouton, Aïkpon Rock, Hoyochi Isidore, Salako Albert Sourou, Konkon Camus, Lokossou Antoine Salomon, Dangnon Brice, Baba-Moussa Lamine, Akogbéto Martin Codjo, Padonou Germain Gil
Centre de Recherche entomologique de Cotonou (CREC), Cotonou, 06 BP 2604, Benin.
Faculté des Sciences et Techniques de l, Université d'Abomey-Calavi, Abomey-Calavi, Benin.
Trop Med Health. 2025 Aug 22;53(1):113. doi: 10.1186/s41182-025-00794-6.
The main vectors of arboviruses, such as Aedes aegypti and Aedes albopictus, are present in Benin and deserve special attention in dengue prevention policies. In this context, the current study was initiated to provide information on the biology, ecology, including feeding behavior and life expectancy of Aedes aegypti and Aedes albopictus in southern Benin.
A larval survey was conducted in conjunction with a human landing catch (HLC), a Prokopak aspirator catch, and a survey of Aedes spp. breeding sites. The ovary dissection method was used to determine the age of the vectors. This allowed to assess the biology, ecology, exophagy or endophagy, and age expectancy of both Aedes aegypti and Aedes albopictus in southeastern Benin.
A total of 11 mosquito species were collected, with Aedes aegypti and Aedes albopictus showing the highest relative abundances, ranging, respectively, from 29.57% to 43.99% and from 16.26% to 45.65%, depending on the sampling method employed. Used tires accounted for 48.03% [45.06; 50.99] of all deposits found and were the most infested with Aedes spp. larvae, followed by buckets (14.23%) and jars (15.24%). The two main Aedes species studied (Aedes aegypti and Aedes albopictus) are more aggressive outdoors than indoors. Two peaks of aggressiveness were generally observed for both species: a first cycle in the morning from 7 a.m. to 11 a.m. and a second cycle in the evening from 4 p.m. to 7 p.m. A total of 76.47% of the Aedes aegypti and 81.21% of the Aedes albopictus samples were parous.
Used tires and household containers (jars, water buckets, etc.) are the main breeding sites for Aedes spp., underscoring the importance of educating people about good water management habits. Aedes aegypti and Aedes albopictus, the main vectors of arboviruses, are exophagous and highly aggressive outdoors, with critical periods for human exposure, particularly in the morning and at the end of the day. Most of the collected females have already laid eggs (parous) and therefore are potentially susceptible to transmitting pathogens.
诸如埃及伊蚊和白纹伊蚊等虫媒病毒的主要传播媒介在贝宁存在，在登革热预防政策中值得特别关注。在此背景下，开展了本研究以提供有关贝宁南部埃及伊蚊和白纹伊蚊的生物学、生态学（包括摄食行为和预期寿命）的信息。
结合人饵诱捕法（HLC）、Prokopak吸虫器捕集法以及伊蚊属繁殖地调查进行幼虫调查。采用卵巢解剖法确定传播媒介的年龄。这使得能够评估贝宁东南部埃及伊蚊和白纹伊蚊的生物学、生态学、外食性或内食性以及预期寿命。
共采集到11种蚊子，埃及伊蚊和白纹伊蚊的相对丰度最高，根据所采用的采样方法，其相对丰度分别在29.57%至43.99%以及16.26%至45.65%之间。废旧轮胎占所有发现的积水点的48.03%[45.06；50.99]，且伊蚊属幼虫在其中滋生最多，其次是水桶（14.23%）和罐子（15.24%）。所研究的两种主要伊蚊（埃及伊蚊和白纹伊蚊）在户外比在室内更具攻击性。这两种伊蚊通常都观察到两个攻击高峰：第一个高峰在上午7点至11点，第二个高峰在下午4点至7点。埃及伊蚊样本中76.47%以及白纹伊蚊样本中81.21%已产过卵。
废旧轮胎和家用容器（罐子、水桶等）是伊蚊属的主要繁殖地，这突出了教育人们养成良好用水管理习惯的重要性。虫媒病毒的主要传播媒介埃及伊蚊和白纹伊蚊是外食性的，在户外极具攻击性，存在人类暴露的关键时期，尤其是在早晨和一天结束时。所采集的大多数雌蚊已经产过卵（已产过卵），因此有可能传播病原体。
