Chapel Hill — More than 80 UNC-Chapel Hill students suffered from intestinal viruses last week, but the outbreak appears to be waning, Orange County public health officials said Monday.

Between Wednesday and Friday, dozens of UNC students got medical help while dealing with nausea, vomiting, diarrhea, and/or fever.

Students who were seen by the Campus Health Service were sent an electronic survey as health officials tried to find out what was causing the symptoms.

Stool samples of five students confirmed three cases of norovirus, but test were negative for salmonella, shigella, campylobacter and shiga-toxin producing E. coli.

Campus Dining and Campus Housing are using extra disinfecting measures to get rid of norovirus in their facilities. Five students were treated Monday with intestinal problems, roughly an average number for the time of year.