Epidemiologists at the Alachua County Health Department are working to trace the source of an outbreak of salmonella enterocolitis that struck 23 people who had eaten at one Gainesville restaurant between Sept. 10 and 15.

Epidemiologist Jerne Shapiro said that nearly two dozen people felt sick after eating at The Swamp Restaurant the weekend of Sept. 10 or shortly thereafter. Most had ordered a salad.

She said that restaurant employees had been tested for salmonella, and the restaurant itself had been inspected twice since the outbreak was reported. No new cases have been reported for close to two weeks.

Shapiro said that all possible avenues of contamination were being examined, including the restaurant’s outside suppliers, but as of Friday, no conclusions had been reached.