Nelly Armanda KALA CHOUAKEU1*
1University of Dschang, Cameroon
CaHReF 2018, Yaoundé Congres hall, 08 – 11 January 2019 , OERF016
Background: Malaria remains a major public health problem in Cameroon and the city of Yaounde is not saved. The main difficulty of vector control remains their adaptability in diverse environmental conditions.
Objectif: We undertook a study with main objective to determine the influence of bioecological parameters affecting the distribution of anopheline.
Methodology: Prospections of anopheline larvae breeding sites were done during four seasons (from May to December 2017), in eight neighbourhoods of the city of Yaounde. Breeding sites were geo-referenced using a GPS (Garmin) and were physically characterised. For each cluster per collection period, ten breeding sites (five positive and five negative) were retained for the measure of physico-chemical parameters using a Wagtech portable kit. Those parameters were then correlated to the presence and the density of anopheline larvae.
Results: The obtained results revealed that, Nkolbisson, Ekounou-palais and Tsinga 8e were points with high number of positive breeding sites. The presence of anopheline larvae in a breeding site was positively and significantly correlated with temperature, turbidity, pH and distance to the nearest house while it was negatively correlated with the presence of predators, the size and the depth of the breeding site. However, pH, conductivity, temperature, turbidity and Calcium was significantly correlated with larval density contrarily to the presence of predators, the depth, the surface area and presence of vegetation around the breeding sites negatively impacted on larval.
Conclusion/Recommandation: Parameters as seasons, clusters, temperature, turbidity, pH, conductivity, Calcium, distances to the nearest should be used in larvae control program.
Key Words: Physico-chemicals, biological, distribution, anopheline larvae, Yaounde