In March 2016 the Connecticut Department of Public Health investigated an outbreak of E. coli O157 and E. coli O103 infections among persons who visited Oak Leaf Farm, a goat farm located in Lebanon, Connecticut. A total of 50 confirmed cases of E. coli were identified. Forty cases had visited the farm or had contact with goats from the farm and 6 had contact with someone who had visited the farm. Seven cases were hospitalized. Three cases developed HUS. No one died.

The outbreak strain of E. coli O157 was isolated in 28 out of 61 environmental samples collected. Sixteen of 17 fecal samples collected from goats yielded E. coli O157. Facility design at the farm allowed for direct contact with goats and soiled bedding. The farm did not have hand washing stations or signage to inform visitors of potential disease risks.