Hi Thanks for your query. Noted the history and understood your concerns. History of diarrhea in a 23 year old male of 5 2 and weighing 7 stones and 6 lbs after a visit to Egypt and now have yellow mucus hence worried. Once you get any colitis problem, the mucus may continue to be present and may indicate continuation of the intestinal infection although has been controlled by body s resistance power. I would advise you the following: Get the stool tested and get started on an appropriate antibiotic active against intestinal infection, Metronidazole. Get proper hydration and electrolyte balance. Take only boiled and cooled water. Take home-made food only. These will help resolve the issue within a few days. Get a review after 5 days and if no complete relief, you will need additional investigations and management