Five Confirmed E. coli Cases Tied to SLO County Pumpkin Farm, Source Unconfirmed

Five San Luis Obispo County residents have tested positive for Shiga toxin-producing E. coli, and county officials say all five had been to Brookshire Farms, a pumpkin patch and farm stand on Los Osos Valley Road. The county has not confirmed the farm as the source. The farm closed voluntarily on Tuesday while the investigation continues.

That is the settled part. The County of San Luis Obispo Department of Public Health posted its release at 2:29 p.m. on October 27 and revised it at 4:00 p.m., widening the suspected exposure window from October 16 through 18 to October 16 through 26. Some reports still carry the shorter window. The county says symptoms typically appear 3 to 10 days after a visit.

“We are working diligently to identify the source of these infections.”

What is reported about the children

Cal Coast News, citing the county's announcement, reported that three of the patients are children in serious condition. KSBY reported, citing a health office notice to providers, that three young children were hospitalized with kidney involvement, and that the five cases include some children under 10 and a few young adults. Headlines elsewhere use the phrase intensive care. The county release as published does not give ages or a hospitalization count, so the outlets are working from different pieces of the same briefing.

Kidney involvement matters because of hemolytic uremic syndrome, or HUS, the complication STEC is best known for. The CDC calls HUS a medical emergency and says people with it should be hospitalized. Among people with diarrhea, it is most common in children under 5, and about 8 in 10 children with HUS have a STEC infection. Most people recover within a few weeks, but some have permanent health problems or die. None of the reports I could load says a child has been diagnosed with HUS. Kidney involvement is not the same as a confirmed diagnosis.

What nobody has said yet

The county has not named the specific STEC type, said whether the patients' bacterial samples match each other, or said whether animals, soil or surfaces at the farm were sampled. KSBY reported that the farm expects testing results in a couple of days. Its owner called the situation "a hard situation," said the farm is cooperating with officials, and earlier said a direct link between the farm and the cases had not been confirmed.

Dr. Mulkerin told KSBY that officials know the five people all went to Brookshire Farms but are still working out how they became ill. A shared visit is a lead, not a mechanism. A farm stand, a corn maze and a petting area each carry different exposure routes, and the county has not said which, if any, applies here.

A second farm, a different state

Separately, the Will County Health Department in Illinois reported five confirmed STEC cases tied to Bengtson's Pumpkin Farm in Homer Glen, according to a summary on the Marler Blog, a plaintiff-side food safety law firm's site, so treat its framing as advocacy and its figures as secondhand. It lists ages 4 to 38 and four hospitalizations as of October 26, with the petting zoo closed October 23. Nothing released so far links the Illinois cluster to California.

I could not find a count of how often farm attractions produce outbreaks, so there is no base rate to say whether two in one week is unusual. The same blog lists earlier petting zoo outbreaks, including a 2025 Arizona State Fair cluster it puts at 18 sick, 11 hospitalized and six with HUS. That is one law firm's list, not a surveillance total.

What the health agencies say to watch for

The county asks anyone who visited the farm during the window and has gastrointestinal illness, mainly cramping and bloody diarrhea, to contact a healthcare provider. It lists children under 10 as the group at highest risk of complications. The CDC's general guidance lists diarrhea or vomiting lasting more than 2 days, bloody stool or urine, a fever above 102 degrees Fahrenheit, and signs of dehydration as reasons to call a doctor. It notes that dehydration can come on quickly in young children.