Breeding Site Characteristics of Mosquito in Ouagadougou, Burkina Faso

Le résumé fourni par la source

Urban areas deal with the emergence or resurgence of transmissible and non-transmissible diseases, linked in particular to urban lifestyle and sanitation issues. Human practices create or maintain conditions that favour mosquitoes’ breeding. This study investigates mosquito breeding sites characteristics in Ouagadougou, from September to November 2020. Mosquito larvae were sampled across three districts in the city, chosen based on socio-demographic and urbanization levels. The larval collection from natural breeding sites using the ladle technique and larvae transferred to can. For artificial sites, the larvae were transferred directly into can Larvae were collected from 83 breeding sites, predominantly artificial: 39% in plastic containers, 23% in clay containers, and 13% in metal, while natural sites like puddles accounted for only 25%. A total of 8352 mosquitoes were identified as six species: Aedes aegypti, Aedes albopictus, Culex quinquefasciatus, Anopheles gambiae s.l., Anopheles funestus, and Mansonia africana. Ae. aegypti was the most prevalent, found across all breeding site types, whereas Culex quinquefasciatus and Anopheles gambiae were mainly in natural sites. Physico-chemical analysis of the breeding sites revealed that conductivity and turbidity were consistent across breeding sites. The highest median pH values were observed in ceramic and metal containers. Water temperature showed minimal variation. The presence of Anopheles gambiae and Culex quinquefasciatus correlated with higher water temperature, turbidity, and conductivity. Anopheles funestus preferred high pH environments. Conversely, Aedes aegypti, Aedes albopictus, and Mansonia africana were less influenced by these parameters. The findings underscore the need for community involvement in water and waste management to control mosquito populations, especially targeting the Aedes aegypti species. Raising awareness among locals about proper water storage and disposal practices is crucial for effective vector control.

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