The Louisburg Cider Mill is shown in this file photo from 2011.

Topeka ? The Kansas Department of Health and Environment is currently conducting an investigation of an outbreak of E. coli among people who attended the Louisburg Cider Mill Ciderfest, which was held Sept. 24-25 and Oct. 1-2, according to a KDHE news release on Wednesday.

To date, there are seven laboratory-confirmed cases associated with this investigation, KDHE said. However, the investigation is ongoing and information is subject to change. The Kansas Department of Agriculture along with the U.S. Food and Drug Administration and KDHE performed an on-site assessment on Oct. 27.

If anyone has experienced diarrhea within one to 10 days after attending the Ciderfest on Sept. 24-25 or Oct. 1-2, please call the KDHE Epidemiology Hotline at 877-427-7317.

For information about E. coli infection visit www.cdc.gov/ecoli/general/index.html