1 Department of Clinical Medicine, Faculty of Veterinary Medicine, Molecular Biology Laboratory (MBL), University of Khartoum, P.O. Box 32, Khartoum North, Sudan.
2 Department of Medical laboratory Sciences, Faculty of Medicine, University of Elgadarif, Elgadarif, Sudan.
3 Department of Microbiology, Faculty of Science, University of Kassala, Kassala, Sudan.
4 Deanship of Scientific Research, Alneelain University, Khartoum, Sudan.
5 Deanship of Scientific Research, International University of Africa, Khartoum, Sudan.
6 Department of Clinical Medicine, Faculty of Veterinary Medicine, Molecular Biology Laboratory (MBL), University of Khartoum, P.O. Box 32, Khartoum North, Sudan. aradaib@uofk.edu.