I have been retained by the family of a woman who was hospitalized with a Shiga toxin-producing E. coli (STEC) infection after visiting Brookshire Farms, the pumpkin patch and corn maze at 4747 Los Osos Valley Road in San Luis Obispo. The family has asked me to find out what made her sick. She is one of the two adults among the five confirmed cases the County of San Luis Obispo Department of Public Health announced on October 27. The other three are children, and county spokesman Tom Cuddy has said all three are in serious condition in a pediatric intensive care unit, as reported by ABC News and SFGATE.
Five cases, at least four of them hospitalized.
The county has not said publicly whether either adult was hospitalized. My client was. That means at least four of the five people confirmed so far in this outbreak have needed hospital care, three of them children in intensive care. That is not a mild outbreak, and it should change how quickly and how completely the county reports what it knows.
What we know, and what we do not.
The suspected exposure window is October 16 through 26, widened on the afternoon of October 27 from an initial three days, as KSBY first reported the shorter window. The farm closed voluntarily the same day. On October 28 the county added precautionary advice to throw out carved Brookshire pumpkins and scrub intact ones. No source has been named. The county has not released the serotype, whether the patient isolates have been sequenced and match, whether any animals are on or near the property, or whether any patient has been diagnosed with hemolytic uremic syndrome. Brookshire’s listed attractions, as compiled by Food Safety News, include hayrides, grain-cart rides, pedal carts, a jumping pillow, a playground, a hay climb, a hay maze and the corn maze.
Three children in a pediatric ICU with E. coli almost certainly means HUS.
Most people with STEC get miserably sick, with cramping and bloody diarrhea, and recover in about a week. Children do not end up in pediatric intensive care from the diarrhea. In more than thirty years of doing this work, starting with Brianne Kiner in the 1993 Jack in the Box outbreak, I have seen very few children in a PICU with an E. coli infection where the reason was not hemolytic uremic syndrome. The county has not used the term, and I do not know the medical details of any of these children. But it is highly unlikely that three children are in intensive care with E. coli and HUS is not the reason, and the county should say so plainly. The parents of these children, and the parents of every other child who visited Brookshire in those ten days, deserve a plain explanation of what HUS is.
What is hemolytic uremic syndrome?
HUS is a complication of infection with Shiga toxin-producing E. coli. The bacteria stay in the gut, but the toxin they make crosses into the bloodstream and attacks the cells lining small blood vessels, especially in the kidneys. Tiny clots form in those damaged vessels. Three things follow, and together they define HUS: red blood cells are torn apart as they squeeze past the clots (hemolytic anemia); platelets are used up in the clotting (thrombocytopenia); and the kidneys’ filters are injured and stop working (acute kidney injury).
HUS typically shows up about a week after the diarrhea begins, often just as the diarrhea seems to be getting better. That timing is what makes it so dangerous. Parents think the worst is over. The warning signs are decreased urination, unusual paleness, tiredness or irritability, puffiness in the face, hands or feet, and unexplained bruising.
Who gets it, and what happens in the hospital.
Children under five are at the greatest risk. Roughly 15 percent of young children with E. coli O157:H7 infections develop HUS, compared with a much smaller share of older children and adults, though older adults who develop it often do worse. There is no drug that cures HUS. Treatment is supportive and can be long: careful control of fluids and electrolytes, blood and platelet transfusions, and, in about half of cases, dialysis to do the work the kidneys cannot. The toxin does not always stop at the kidneys. It can affect the brain, causing seizures or strokes, and the pancreas, heart and intestines. Most children survive, but a small percentage do not.
What HUS can leave behind.
Surviving the hospital stay is not the end of the story. A substantial share of children who have HUS, by many estimates a quarter to a third, are left with lasting kidney damage: high blood pressure, protein in the urine, reduced kidney function, and for some, kidney failure that requires dialysis or a transplant years or even decades later. That is why children who have had HUS need follow-up with a nephrologist for life, and why the true cost of an outbreak like this one is often not known for years.
Adults are not immune.
Adults get HUS less often than young children, but they do get it, and adult STEC infections can be serious in their own right. My client’s hospitalization is a reminder that the county’s focus on children under ten, while appropriate, should not lead anyone to shrug off symptoms in an adult who visited the farm.
What families should do now.
If anyone in your family visited Brookshire Farms between October 16 and 26, or handled a Brookshire pumpkin, and develops diarrhea, especially bloody diarrhea, see a doctor, tell them about the farm, and ask for a stool culture. Do not give anti-diarrheal medicine, and ask before using antibiotics, which can raise the risk of HUS in O157 infections. If someone has already been sick, keep watching for the HUS warning signs for at least two weeks after the diarrhea started. Cooperate with county investigators when they call; the interviews and lab samples they collect are how the source gets found. More on HUS is at about-hus.com, and prevention material for families and farm operators is at Fair-Safety.com.
What happens next.
My client’s family wants the same thing every family in this outbreak wants: to know how this happened. That means knowing whether the patient isolates match by whole-genome sequencing, what the county sampled on the farm and what it found, where the pumpkins were grown, and what animals, manure, compost or water sources are on or near the property. I will be asking those questions, and I will report what I learn here. Earlier coverage is in yesterday’s post and in Tuesday’s comparison of Brookshire and Bengtson’s Pumpkin Farm in Illinois.
How many people are sick in the Brookshire Farms E. coli outbreak?
Five confirmed as of October 27, 2026: two adults and three children, all of whom visited the farm. The three children are in pediatric intensive care, and at least one adult, a Marler Clark client, was hospitalized.
Has anyone developed hemolytic uremic syndrome?
The county has not said. But three children in pediatric intensive care with E. coli is highly unlikely to mean anything else.
What is HUS?
A complication of Shiga toxin-producing E. coli in which the toxin damages small blood vessels, destroying red blood cells and platelets and injuring the kidneys. About half of patients need dialysis, and some are left with lifelong kidney problems.
When does HUS develop?
Usually about a week after diarrhea begins, often as the diarrhea is improving. Decreased urination, paleness and lethargy are the warning signs.
Has the source been found?
No. The farm is closed, the county issued precautionary pumpkin guidance on October 28, and the investigation is ongoing.
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