The Minnesota Department of Health and Olmsted County Public Health Services investigated the outbreak and identified 23 cases of Salmonella infection among patrons and employees of the restaurant; 18 were culture-confirmed, and one person was hospitalized for two days. All cases ate food prepared at the restaurant between October 1 and October 8, 2007.
In its final outbreak report, MDH concluded:
This was an outbreak of S. Typhimurium infections associated with consumption of tomatoes at a Quiznos restaurant. The tomatoes were likely already contaminated when they entered the restaurant. Based on case meal dates and produce receipt records, the most likely scenario is that the outbreak was due to second-use tomatoes that entered the restaurant on September 27.