1. Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia.
2. Central Laboratory College of Science, King Saud University, Riyadh, Saudi Arabia.
3. Department of Pathology, King Saud University, Riyadh, Saudi Arabia.
4. Department of Surgery, Colorectal Research Center, King Saud University, Riyadh, Saudi Arabia.
5. Department of Clinical Infection, Microbiology and Immunology, Faculty of Health and Life Sciences, Institute of Global Health, University of Liverpool, Liverpool, United Kingdom.