My husband, age 63, has frequent nausea and diarrhea, sometimes with a low temp and sometimes without a temp. I the past 8-10 weeks he has had 3 episodes. This has been happening to him for the last 5 years, although not always this close together. He has a history of a colon resection (also around 5-6 years ago) that was necessary due to a benign growth on his appendix which had attached to colon. His Dr. is not concerned. Who should he consult? What can we do to stop this from happening?