
On November 10, 2026, the Will County Health Department announced the findings of its investigation into Shiga toxin-producing E. coli (STEC) infections among visitors to Bengtson’s Pumpkin Farm in Homer Glen, Illinois. Whole genome sequencing found that bacteria collected from a baby goat in the farm’s petting zoo are closely related to the bacteria collected from the people who became sick.
That answers the question I raised on October 27, when the animal samples had just gone to the state laboratory. Marler Clark is investigating this outbreak on behalf of the family of a child who was sickened.
The numbers as of this update
- Seven laboratory-confirmed STEC cases, up from five. The county identified the two additional cases after reviewing survey responses and laboratory results.
- 159 probable cases, drawn from 270 people who answered the county’s confidential health survey after visiting the farm and developing symptoms. A probable case had a link to the farm and specific symptoms for a set length of time, but no laboratory test.
- 166 confirmed and probable cases in all.
- Samples from several petting zoo animals tested positive for STEC. One baby goat carried bacteria closely related to the human cases.
- The county reviewed the farm’s food service operations and did not identify any concerns.
What the genetic match means
Whole genome sequencing compares the DNA of bacteria from different sources. The county reported two results. First, the bacteria from the sick people were closely related to each other, which points to a common source. Second, the bacteria from one baby goat were closely related to the bacteria from those people. Sean Conners, the county’s Director of Environmental Health, said the farm’s cooperation helped “identify a likely source of the outbreak.”
In a petting zoo investigation, that is about as strong as the evidence gets. It is also not a result anyone could count on. The national Compendium of Measures to Prevent Disease Associated with Animals in Public Settings has long cautioned that animals shed these pathogens intermittently, which is why testing animals is not a reliable way to clear an exhibit. The county’s survey covered visits on or after September 29, and the animals were sampled in late October. Finding the outbreak strain in an animal weeks after the first exposures is a credit to the people who did the sampling and the sequencing.
The signs and the sinks were there, and 166 people still got sick
The county confirmed that the farm had signs at the entrance and exit of the petting zoo about hand washing, about not eating around the animals, and about leaving strollers and wagons outside. Handwashing stations were at the exit. I take the county at its word, and the farm deserves credit for closing the petting zoo voluntarily and arranging for a veterinarian to sample its animals.
That is also the hard lesson of this outbreak. The farm had the items on the standard checklist, and the count still reached seven confirmed and 159 probable. The Compendium explains why signs and sinks are necessary but not sufficient. The prevalence of these pathogens is often higher in young animals, and young animals are what petting zoos exhibit. Transmission has also been tied to contaminated bedding, flooring, barriers, clothing and shoes, which means a child does not have to touch the goat to be exposed.
A sign does not wash a four-year-old’s hands. The county says it will work with Bengtson’s and other petting zoo operators on additional ways to educate visitors. I would ask every operator and every health department to go further before next fall and read the current Compendium against their own layout: who stands at the exit and sends each family to the sink, how young children are supervised inside the pen, and whether the youngest animals belong in a hands-on exhibit for the youngest children at all.
What the county has not yet said
- Which STEC caused the outbreak. The release does not give a serotype.
- How many of the seven confirmed cases were hospitalized and whether any developed hemolytic uremic syndrome (HUS). As of October 26, four of the first five had been hospitalized.
- The ages and illness onset dates of the two newly confirmed cases, and the range of visit dates among the 166.
- What has been done with the animals that tested positive, and under what conditions the petting zoo would reopen.
The county has been more open than most. It published its laboratory findings, and it published a probable case count, which many agencies never do. I asked on October 27 that the results go on the county’s website, and they did. The remaining details belong there too, because the next operator should be able to read the whole file.
If you visited Bengtson’s and got sick
According to the county, symptoms of STEC infection can begin one to ten days after exposure and most often appear within three to four days. They include severe stomach cramps, diarrhea that may be bloody, vomiting, and a low fever or none. Children under five are at the greatest risk of HUS, which can damage the kidneys. Anyone with bloody diarrhea, signs of dehydration or other severe symptoms should get medical attention promptly and ask for a stool test. The county and the Illinois Department of Public Health are continuing to monitor for additional cases.
Questions and answers
How many people are sick in the Bengtson’s Pumpkin Farm E. coli outbreak?
Seven laboratory-confirmed cases and 159 probable cases as of November 10, 2026, according to the Will County Health Department.
Was the source found?
Whole genome sequencing found a close genetic match between bacteria from confirmed human cases and bacteria from a baby goat in the farm’s petting zoo. The county calls it a likely source.
Was food at the farm involved?
The county reviewed the farm’s food service operations and did not identify any concerns.
Is the petting zoo open?
The farm closed the petting zoo voluntarily when the county first contacted it. The county’s findings release does not say whether or when it will reopen.








