1. Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Ministry of Education Eco-Environment of the Three Gorges Reservoir Region, School of Life Sciences, Southwest University, Chongqing, China;
2. Department of Clinical Microbiology, College of Medical Laboratory Sciences, Omdurman, Islamic University, Omdurman, Sudan