Japheth Mativo Nzioki

Department of Environmental Health, University of Kabianga, Kericho, Kenya

Rosebella Ogutu Onyango

Department of Public Health, Maseno University, Kisumu , Kenya

James Ouma

Department of Environmental Health, University of Kabianga, Kericho, Kenya

James H. Ombaka

Department of Biomedical Sciences and Technology, Maseno University, Kisumu, Kenya