I am starting to get worried about my husband, he has severe d and v for 5 days, looks very poorly, he managed some fluids but virtually no food, is very tired and weak. He is a nurse so may have been exposed to some unusual bug, so far no one else in the family has any sign of illness and he cant think of any food only he has eaten. Is it normal for d and v to carry on for so long? He has a past history of ibs, a blood positive for ceolics disease( but negative on biopsy) advised to follow gluten free diet which is does ( not 100% ) previously had cfs type symptoms which seemed to improve with diet and lifestyle change. He has a doctors appointment for Wednesday next week but I just wondered if it unusual for a d and v bug to last for such a long time with very little sign of improvement?