Rahama, Abbas Bakhit Mohammed, 1 MSCs. Faculty of Medical Laboratory Sciences, Department of Medical Microbiology, Al Neelain University, Sudan 2 PhD. College of Medical Laboratory Sciences, Department of Medical Microbiology Sudan University of Science and Technology, Sudan 3 MD General Surgery, consultant surgeon and gastroenterologist, Omdurman Military Teaching Hospital, Sudan 4 BSCs. Faculty of Medical Laboratory Sciences, Department of Medical Microbiology, Al Neelain University, Sudan, Sudan