A salmonella outbreak at the University of Western Ontario has grown to almost 100 cases, with 11 new laboratory-confirmed cases reported Monday.

The Middlesex-London Health Unit says there are 53 confirmed cases and another 44 people who have symptoms of salmonella infection.

Five people have been sent to hospital, mainly to treat dehydration, fever, headache, abdominal pain, diarrhea, nausea and vomiting.

Health officials theorize the contamination originated at a Pita Pit fast-food outlet at the university and spread around a food court.

During the weekend, the university shut down the food court in an effort to wipe out the contamination.

Bryna Warshawsky of the health unit says all equipment used to prepare food was sanitized and food prepared prior to the cleaning was discarded.