On September 27, 2017, routine surveillance by the Kansas Department of Health and Environment's Infectious Disease Epidemiology and Response section (KDHE) identified a cluster of persons with illness caused by Shiga toxin-producing Escherichia coli (STEC) who reported attending a house party on September 18, 2017 in southeast Kansas.

Four confirmed and two probable cases of E. coli O157:H7 were identified. Five children were hospitalized and no deaths were reported. Reported activities at the party included swimming in a privately-maintained, chlorinated pool and eating food provided by the hosts. No activity or food item was found to be associated with illness and no fecal incident was reported in the swimming pool, therefore transmission is considered to have been person-to-person.