1. Department, of Biochemistry, Faculty of Medicine, University of Khartoum, Sudan
2. Centre of Biosciences and Biotechnology, Faculty of Science and Technology, University of Gezira, P.O. Box 2667, Khartoum, Sudan
3. Department of Biochemistry, Faculty of Medicine, University of Khartoum, Sudan
4. Panum Institute, University of Copenhagen, Copenhagen, Denmark
5. Department Clinical Microbiology, National University Hospital, 7806, Tagensvej 20, DK‐2200, Copenhagen N, Denmark
6. Department of Pharmacognosy, Faculty of Pharmacy, University of Khartoum, Sudan