1.Department of Applied Microbiology and Brewing, Nnamdi Azikiwe University, P.M.B. 5025 Awka, Anambra State, Nigeria
2.Department of Microbiology, Faculty of Biological Sciences, University of Nigeria, Nsukka, Enugu State, Nigeria
3.Ebonyi State Environmental Protection Agency, Work House, P.M.B. 068 Abakaliki, Ebonyi State, Nigeria