Larviciding intervention targeting malaria vectors also affects Culex mosquito distribution in the city of Yaoundé, Cameroon

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 ORCID: https://orcid.org/0000-0003-0791-3673 and Nkondjio, Christophe (2023) 'Larviciding intervention targeting malaria vectors also affects Culex mosquito distribution in the city of Yaoundé, Cameroon'. Current Research in Parasitology and Vector-Borne Diseases, Vol 4, Issue 2023, e100136.

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Abstract

Although Culex 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 Culex 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 Culex larvae and 36.65% reduction of adult Culex densities in houses. Adult Culex densities were reduced both indoors (35.26%) and outdoors (42.37%). No change in the composition of Culex species was recorded. The study suggests a high impact of larviciding on Culex mosquito species distribution. The impact of the intervention can be improved if typical Culex breeding habitats including pit latrines are targeted.

Item Type:	Article
Subjects:	QX Parasitology > Insects. Other Parasites > QX 510 Mosquitoes WC Communicable Diseases > Tropical and Parasitic Diseases > WC 750 Malaria
Faculty: Department:	Biological Sciences > Vector Biology Department
Digital Object Identifer (DOI):	https://doi.org/10.1016/j.crpvbd.2023.100136
SWORD Depositor:	JISC Pubrouter
Depositing User:	JISC Pubrouter
Date Deposited:	26 Sep 2023 08:47
Last Modified:	26 Sep 2023 10:13
URI:	https://archive.lstmed.ac.uk/id/eprint/23189

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