1. Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Department of Epidemiology and Health Statistics, School of Public Health, Southeast University, Nanjing, 210009 Jiangsu Province, China
2. Biomedical Research Institute, Darfur College, Nyala, Sudan
3. Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Global Health, School of Public Health, Southeast University, Nanjing, 210009 Jiangsu Province, China
4. Department of Biological Sciences, Faculty of Science, Abubkar Tafawa Balewa University, Bauchi-740272, Nigeria
5. Department of Medical Microbiology, Faculty of Medical Laboratory Sciences, University of Khartoum, Khartoum, Sudan