Hi thanks for asking question. You can first have to examine your stool. If pus cells present then chances of bacterial enteritis is present. It will also reveal parasite egg if present especially amebiasis. This yellow sticky mucus also can be because of excess fat intake daily. Finally some people can have lactose intolerance or hypersensitivity to gluten. Gluten present in rye, wheat etc while lactose in milk and cheese like food.so they can be avoided if allergy to that and having mal absorption. Stool culture also can be done to rule out fungal infection.but fungal infection of intestine should be thought at last after filling out other above causes. I hope I have solve your query