The number of confirmed Salmonella cases linked to two Weld County restaurant locations jumped from 21 to 35, the department of health announced Thursday. The source of the foodbourne illness outbreak has been linked to Burrito Delight restaurants in Fort Lupton and Dacono, both of which voluntarily closed on Feb. 22, when the outbreak was first linked to food from the sites.

The Weld County Department of Public Health and Environment (WCDPHE) has still not located the specific source of the outbreak, and laboratory testing results of the employees will not be available until Monday, the department said.

The total number of people with confirmed cases who reportedly ate food catered by Burrito Delight at Aims Community College in Greeley has risen to 17 cases. Thirteen people were confirmed to have Salmonella who ate food at an Aims event Feb. 13, and four people who dined at a Feb. 6 event had confirmed cases. More than 450 people attended the two events at Aims, health officials said.