Although most doctors deny ulcerative colitis is contagious, I am beginning to doubt this. Once a week for the past 6 months a friend with ulcerative colitis has been making hamburgers for me. For the next 3 days after consuming her food, I have awful runny diarrhea. I have not eaten food cooked by her for the past 3 weeks and things are back to normal with me. I gave some of her burgers to another relative - same symptoms with him, for the 3 days following consumption. Making burgers consists of excessive handling of food. Is it not possible that some people could be infected - even if only for a few days?