MT-ND5 and onchocerciasis: Analysis of the flies showed infectivity for Ov ND5 genes in designated communities in the main Ose River and its tributaries indicating the presence of reservoirs of human Onchocerca volvulus microfilariae of onchocerciasis in the area.<h4>Conclusion</h4>The results of this study demonstrate the possibility of significant reduction in Simulium damnosum complex biting rates with sustained slash-and-clear activity in the region (most especially the tributaries).