Djiappi-Tchamen Borel, Nana-Ndjangwo Mariette Stella, Tchuinkam Timoléon, Makoudjou Idene, Nchoutpouen Elysée, Kopya Edmond, Talipouo Abdou, Bamou Roland, Mayi Marie Paul Audrey, Awono-Ambene Parfait, Wondji Charles, Antonio-Nkondjio Christophe
Vector Borne Diseases Laboratory of the Research Unit Biology and Applied Ecology (VBID-RUBAE), Department of Animal Biology, Faculty of Science, University of Dschang, Dschang P.O. Box 067, Cameroon.
Institut de Recherche de Yaoundé (IRY), Organisation de Coordination pour la Lutte Contre les Endémies en Afrique Centrale (OCEAC), Yaoundé P.O. Box 288, Cameroon.
Insects. 2021 Sep 12;12(9):819. doi: 10.3390/insects12090819.
The surveillance of mosquito vectors is important for the control of arboviruses diseases worldwide. Detailed information on the bionomics and distribution of their main vectors, and is essential for assessing disease transmission risk and for better planning of control interventions.
Entomological surveys were carried out from November 2019 to November 2020 in six localities of Yaoundé city following a transect from urban to rural settings: two urban (Obili, Mvan), two peri-urban (Simbock, Ahala) and two rural areas (Lendom, Elig-essomballa)-during rainy and dry seasons. All water containers were inspected. mosquito abundance, species distribution and seasonal distribution patterns were compared using generalized linear models. Stegomyia indexes were estimated to determine the risk of arbovirus transmission.
A total of 6332 mosquitoes larvae were collected (2342 in urban areas, 1694 in peri-urban areas and 2296 in rural sites). species recorded included , , spp. High mosquito abundance was registered in the rainy season (4706) compared to the dry season (1626) ( < 0.0001). was the most abundant species in urban (96.89%) and peri-urban (95.09%) sites whereas was more prevalent in rural sites (68.56%) ( < 0.0001). Both species were found together in 71 larval habitats. was mostly found in discarded tires (42.51%), whereas was more prevalent in plastic containers used for storing water (65.87%). The majority of mosquitoes' breeding places were situated close to human dwellings (0-10 m).
Uncontrolled urbanization seems to greatly favour the presence of mosquito species around human dwellings in Yaoundé. Controlling mosquito distribution is becoming urgent to reduce the risk of arbovirus outbreaks in the city of Yaoundé.
蚊虫媒介监测对于全球虫媒病毒疾病的控制至关重要。有关其主要媒介的生物学特性和分布的详细信息，对于评估疾病传播风险以及更好地规划控制干预措施至关重要。
于2019年11月至2020年11月在雅温得市的六个地区进行了昆虫学调查，调查沿着从城市到农村的样带进行：两个城市地区（奥比里、姆万）、两个城郊地区（辛博克、阿哈拉）和两个农村地区（伦东、埃利格 - 埃索姆巴拉），涵盖雨季和旱季。检查了所有的水体容器。使用广义线性模型比较了蚊虫数量、种类分布和季节分布模式。估算了埃及伊蚊指数以确定虫媒病毒传播风险。
共收集到6332只蚊虫幼虫（城市地区2342只，城郊地区1694只，农村地区2296只）。记录的种类包括……等。与旱季（1626只）相比，雨季的蚊虫数量较多（4706只）（P < 0.0001）。埃及伊蚊是城市（96.89%）和城郊（95.09%）地区最常见的种类，而致倦库蚊在农村地区更为普遍（68.56%）（P < 0.0001）。在71个幼虫栖息地中同时发现了这两种蚊虫。埃及伊蚊主要在废弃轮胎中被发现（42.51%），而致倦库蚊在用于储水的塑料容器中更为常见（65.87%）。大多数埃及伊蚊的滋生地位于靠近人类住所的地方（0 - 10米）。
不受控制的城市化似乎极大地促进了雅温得市人类住所周围埃及伊蚊种类的存在。控制埃及伊蚊的分布对于降低雅温得市虫媒病毒爆发的风险变得紧迫。
