Culex species are widespread across Cameroon and responsible for high burden of nuisance in most urban settings. However, despite their nuisance, they remain less studied compared to anophelines. The present study aimed assess distribution, susceptibility insecticide, bionomics role Lymphatic Filariasis (LF) transmission the city Yaoundé.Mosquito collections were conducted from March December 2017 using Centre Disease Control light traps (CDC-LT), human landing catches (HLC) larval...

To identify potential sylvatic, urban and bridge-vectors that can be involved in current or future virus spillover from wild to more urbanised areas, entomological field surveys were conducted rural, peri-urban areas spanning the rainy dry seasons western Cameroon. A total of 2650 mosquitoes belonging 37 species eight genera collected. Mosquito richness was significantly influenced by specific combination habitat type season. The highest found area (S = 30, Chao1 121 ± 50.63, ACE 51.97 3.88)...

Abstract Culex mosquitoes particularly quinquefasciatus are important arboviral and filariasis vectors, however despite this epidemiological role, there is still a paucity of data on their bionomics. The present study was undertaken to assess the insecticide resistance status Cx. populations from four districts Yaoundé (Cameroon). All except one displayed high bendiocarb malathion with mortalities ranging 0 89% while intensity against both permethrin deltamethrin recorded. Molecular analyses...

The emergence of insecticide resistance in Aedes mosquitoes could pose major challenges for arboviral-borne disease control. In this paper, susceptibility level and mechanisms were assessed aegypti (Linnaeus, 1762) albopictus (Skuse, 1894) from urban settings Cameroon. F1 progeny collected Douala, Yaoundé Dschang August to December 2020 was tested using WHO tube assays with four insecticides: deltamethrin 0.05%, permethrin 0.75%, DDT 4% bendiocarb 0.1%. TaqMan, qPCR RT-qPCR used detect kdr...

Specific information about the dispersion of Culex quinquefasciatus from Dschang in western Cameroon is scarce, and evidence-based interventions are needed. Common use larvicides adulticides conduct to development vectors resistance which can lead deep biological changes, including fitness costs. We assessed profile insecticide field populations Cx. quiquefasciatus its potential cost a lineage selected for deltamethrin permethrin laboratory two generations. The intensity population was...

Introduction: The surveillance of mosquito vectors is important for the control arboviruses diseases worldwide. Detailed information on bionomics and distribution their main vectors, Aedes aegypti albopictus, essential assessing disease transmission risk better planning interventions. Methods: Entomological surveys were carried out from November 2019 to 2020 in six localities Yaoundé city following a transect urban rural settings: two (Obili, Mvan), peri-urban (Simbock, Ahala) areas (Lendom,...

<ns4:p><ns4:bold>Background:</ns4:bold> Pyrethroid resistance is rapidly expanding in <ns4:italic>An. gambiae</ns4:italic> s.l. populations across Sub-Saharan Africa. Yet there still not enough information on the fitness cost of insecticide . In present study, <ns4:italic>Anopheles coluzzii</ns4:italic> population from city Yaoundé was investigated.</ns4:p><ns4:p> <ns4:bold>Methods:</ns4:bold> A resistant coluzzii </ns4:italic>colony established field collected mosquitoes to both DDT and...

Arbovirus diseases represent a significant public health problem in Cameroon and vector surveillance is key component of prevention strategies. However, there still not enough evidence the efficacy different sampling methods used to monitor Aedes mosquito population dynamic epidemiological settings. The present study provides data on evaluation ovitraps adult city Yaoundé its close vicinity. Entomological surveys were carried out from February 2020 March 2021 two urban (Obili, Mvan),...

Wolbachia spp., known to be maternally inherited intracellular bacteria, are widespread among arthropods, including mosquitoes. Our study assessed the presence and prevalence of infection in wild mosquitoes collected Cameroon, using combination 23s rRNA Anaplasmatacea 16s genes. Mosquitoes that were positive for sequenced subsequent phylogenetic analysis. Out a total 1740 individual belonging 22 species five genera screened, 33 (1.87%) eight (namely, Aedes albopictus, A. contigus, Culex...

Dengue and chikungunya are now widely distributed in Cameroon, but there is still not enough information on their prevalence different epidemiological settings. This study was undertaken to assess the of dengue both urban rural settings Cameroon using three diagnostic tools. From December 2019 September 2021, willing febrile (temperature &gt;38 °C) outpatients visiting four healthcare facilities cities Yaoundé Dizangué were screened for dengue, chikungunya. Clinical features patient recorded...

Abstract Background Choosing an appropriate strategy for mosquito vector control in eco-climatic facies requires knowledge on ecology including population dynamics of species and productivity the breeding sites. The aim this study was to characterize Culex mosquitoes places determine their two localities (Dschang Santchou) separated by a forest cliff West Region Cameroon. Field surveys were conducted from November 2019 June 2020 Dschang Santchou. Mosquito sites georeferenced, each site,...

<ns4:p><ns4:bold>Background:</ns4:bold> Pyrethroid resistance is rapidly expanding in <ns4:italic>An. gambiae</ns4:italic> s.l. populations across Sub-Saharan Africa. Yet there still not enough information on the fitness cost of insecticide . In present study, <ns4:italic>Anopheles coluzzii</ns4:italic> population from city Yaoundé was investigated.</ns4:p><ns4:p> <ns4:bold>Methods:</ns4:bold> A resistant coluzzii </ns4:italic>colony established field collected mosquitoes to both DDT and...

Malaria and lymphatic filariasis are still important public health problems in Cameroon most part of sub-Saharan Africa. However there is not enough informations on the bionomic oviposition behaviour their respectives vectors. The present study assesses influence color organics pollutants presence Culex Anopheles coluzzii females behaviour. Laboratory experiments using quinquefasciatus laboratory colonies were conducted. Gravid offered cups different colors (red, green, yellow, black, purple...

Abstract Long-lasting insecticide nets (LLINs) are the recommended tools against mosquito-borne diseases. However, their physical integrity and bioefficacy in field could be affected by several factors. This study evaluated of used Makenene since 2016. Cross-sectional surveys were carried out after 6 y. A questionnaire was first administered to heads households, then LLINs determined calculating proportional hole index (pHI). WHO cone bioassays conducted determine currently being wild...

Abstract Background Knockdown resistance ( kdr ) is one of the primary mechanisms present in anopheline species. Although this mutation largely spread across Anopheles gambiae s.l. members, its prevalence other species still not well documented. Methods The study investigated distribution and allelic frequencies An. s.l., pharoensis , ziemanni samples collected 2022 2023 nine sites five ecogeographical settings Cameroon. Members complex were identified molecularly by polymerase chain...

Abstract Background With the advance of globalization and decline wild habitats, mosquito-borne viruses are no longer confined to their original sylvatic environments emerging or remerging worldwide. However, little is known about mosquito species implicated in spillovers these from enzootic cycles. Method We conducted an entomological field survey catalogue relative abundance Culicidae fauna rural, peri-urban urban areas Dschang locality West Cameroon. Mosquitoes were collected March-April...

Despite the contribution of secondary vectors to malaria transmission, there is still not enough information on their susceptibility status insecticides. The present study assesses resistance profile Anopheles pharoensis DDT. WHO tube tests were used screen mosquito populations collected from far-north region Cameroon for 4% High DDT in An. Maga, Simatou and Yangah with mortality rates ranging 62.79% 80% was recorded. Direct sequencing (Sanger) VGSC gene undertaken search kdr L1014F/S...

Abstract Pyrethroid resistance is now expanding in the two main arboviruses vectors Aedes aegypti and albopictus from Cameroon. Although recent studies suggested implication of target site (kdr) overexpression detoxification enzymes as key mechanisms, additional mechanisms such cuticular has not been investigated. The present study assesses possible cuticle species to pyrethroids. High hydrocarbon (CHC) content was detected Ae. populations Douala Yaoundé. difference (38% increase) between...

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