Étude du niveau de production larvaire d’<i>Anopheles gambiae</i> s.l. (Diptera: Culicidae) dans différents types de gîtes à Oussou-yaokro au Centre-Ouest et à Korhogo, au Nord (Côte d’Ivoire).

Abstract

Conclusion et application des résultats : La présente étude indique qu'An. gambiae s.l. se développe aussi dans des gîtes atypiques, tels que les jarres, les abreuvoirs d'animaux, les eaux des fosses septiques, les eaux résiduelles de beurre de karité, initialement propices à la reproduction d'Aedes aegypti et de Culex quinquefasciatus. Au regard de nos résultats, la lutte antivectorielle contre les vecteurs du paludisme doit prendre en compte tous les points d'eau sans exclusive en raison de l'ubiquité d'An. gambiae s.l. Mots-clefs : An. gambiae s.l., production larvaire, type de gîtes, milieu rural, milieu urbain, Oussou-yaokro, Korhogo, Côte d'Ivoire Study of Anopheles gambiae s.l. (Diptera culicidae) larval production level in different types of breeding sites in Oussou-yaokro, West-Central and in Korhogo, Northern (Côte d'Ivoire) ABSTRACT Objective: Malaria is a public health problem in Côte d'Ivoire. The control of the vectors requires knowledge of their breeding sites. This study aims to identify the usual and the possibly unusual (or atypical) breeding sites of An. gambiae s.l. in rural and urban areas. Methods and Results: Larval surveys in various water points and measurement of physicochemical parameters were carried during 4 months in Oussou-yaokro (rural area) and by cross-sectional study in Korhogo (urban area). Forty one (41) and 44 sites were identified in Oussou-yaokro and Korhogo respectively and divided into classic and atypical (not usual) breeding sites of An. gambiae s.l. Atypical breeding habitats were in order of importance, tanks or jars for domestic water conservation, drinking troughs for animals, waste water due to shea butter manufacturing, septic tanks and used tires. Most of positive breeding sites were in the immediate environment of local populations. In Oussou-yaokro, the abundance of larvae in atypical breeding sites and in usual breeding sites was similar while in Korhogo usual breeding sites were more productive. The dynamics of the larvae habitats showed that, in rural area, jars have a regular larval production throughout dry and rainy season. The number of larvae habitats in both localities was related to rainfall during the rainy season, but also to practices of population and period of water retention in the containers. Conclusion and application of results: The present study indicates that An. gambiae sl. can also breed in unusual habitats, such as jars, animal drinking troughs, septic tanks, wastewater of shea butter, initially suitable for breeding of Aedes aegypti and Culex quinquefasciatus. In light of these results, vector control against malaria vectors must consider all water points without exception because of the ubiquity of An. gambiae s.l.

Diversity and Abundance of Mosquitoes in the Seaport Area of San Pedro (Côte d’Ivoire)

“…Indeed, port activities create suitable breeding sites for Aedes aegypti. 28 According to Cornet et al, 27 urbanisation leads to a variation in the composition of species of genera Aedes mosquitoes causing a dominance of Aedes aegypti. It was found by Bhadauriya et al 6 that the proliferation of Aedes aegypti was related to the mismanagement of fire extinguisher buckets.…”

Bionomy of Anopheles funestus and Anopheles gambiae, in two areas of high Long-lasting insecticidal Nets coverage in Côte d'Ivoire

“…arabiensis remain the most widespread vector species in sub-Saharan Africa. They are well adapted to various types of breeding sites such as puddles, shallow wells, footprints, rice paddies that are generally common in rural areas (Gbalegba et al 2016). Under natural conditions, these species are generally endophile and anthropophilic with a longevity and density more abundant in the rainy season, causing a large number of malaria (Adja et al 2011).…”

Assessing Anopheles Vector Species Diversity and Transmission of Malaria in Cross-Border Areas of Côte d'Ivoire

“…nili act as secondary vectors [24]. These species are well-adapted to diverse types of breeding sites (e.g., permanent breeding sites or temporary rain pools such as puddles, shallow wells, footprints, or in rice and vegetable elds) in both rural and urban areas [25]. Côte d'Ivoire shows considerable bio-climatic variations from north to south, leading to the subdivision of the country into different ecological zones [26].…”