Five San Luis Obispo County residents test positive for E. coli

Five San Luis Obispo County residents have tested positive for Shiga toxin-producing E. coli, and county health officials say the infections may be linked to a popular pumpkin farm on Los Osos Valley Road. According to a report by CalCoastNews, three of the five confirmed cases are children, all of whom are in serious condition.

The cases are connected to Brookshire Farms, a pumpkin patch, corn maze and farm stand on Los Osos Valley Road that draws families each October. The farm's owners have temporarily closed the operation while the investigation continues, and the source of the infections remains under investigation.

What residents need to know

The SLO County Department of Public Health confirmed the five cases on Tuesday afternoon, Oct. 27. Health officials are urging anyone who visited Brookshire Farms between Oct. 16 and Oct. 26 and is experiencing gastrointestinal symptoms — particularly stomach cramping or bloody diarrhea — to contact their healthcare provider promptly.

The timing matters. Symptoms of Shiga toxin-producing E. coli infection typically appear three to 10 days after exposure, according to the county's advisory, meaning visitors from as far back as mid-October could still develop symptoms in the days ahead. That window makes it likely that additional cases could surface as more people recognize the signs and seek testing.

The illness can cause diarrhea, severe stomach cramps and vomiting. In some cases, infection can lead to serious complications, including kidney damage. Children under the age of 10 are at the highest risk of complications — a sobering fact for a family-oriented fall destination where young children are a large share of visitors.

Why this outbreak hits close to home

Agritourism is woven into autumn on the Central Coast. Pumpkin patches, corn mazes and farm stands along corridors like Los Osos Valley Road are annual traditions for thousands of local families, as well as visitors passing between San Luis Obispo and Los Osos. These venues typically combine animal contact areas, food service, u-pick fields and play equipment — all of which have historically been points of E. coli exposure in similar outbreaks elsewhere in California and across the country.

E. coli outbreaks at petting zoos and pumpkin farms are a recurring public health concern nationally. Shiga toxin-producing E. coli, often abbreviated as STEC, spreads through contact with animal feces, contaminated food or water, or surfaces that have been contaminated. Young children, older adults and people with weakened immune systems are the most vulnerable to severe outcomes, including hemolytic uremic syndrome, a form of kidney damage the county's advisory referenced in warning of possible complications.

It remains unclear from officials' initial announcement exactly which activity or exposure at the farm is suspected — whether animal contact, food or beverage sold on site, or another source — and investigators have not yet identified a definitive cause. Public health staff said they would provide additional information as it becomes available.

How the county is responding

The county Public Health Department is leading the investigation, working to trace the source of the bacteria and determine whether the five confirmed cases share a common exposure point beyond the farm visit itself. Brookshire Farms' voluntary closure removes the suspected exposure site from circulation while that work proceeds.

For now, the county's most urgent message is directed at people who already visited: monitor for symptoms, and don't wait to seek care if they appear. Bloody diarrhea in particular warrants immediate medical attention, especially in young children. Health officials also note that people experiencing symptoms should mention their visit to the farm when talking to a provider — that detail can speed diagnosis and help investigators track the outbreak's scope.

What comes next

The investigation is ongoing. In typical foodborne-illness investigations, public health staff interview confirmed cases to map their movements and exposures, inspect the suspected site, and coordinate with state agencies if the scope widens beyond county lines. Additional confirmed cases — or a clean bill of findings — will shape whether the farm reopens and under what conditions.

For San Luis Obispo County residents, the practical takeaway is vigilance rather than alarm. The risk is limited to those who visited during the identified window, and most people exposed to STEC recover, though the seriousness of the three children's illnesses underscores why officials are treating this as an urgent matter. Parents of children who visited the farm should watch closely for symptoms through early November, given the three- to 10-day incubation period.

Anyone with questions or symptoms is encouraged to contact their healthcare provider. The county has said it will release updates as the investigation develops.

This article is based on reporting by [CalCoastNews](https://calcoastnews.com/2026/10/five-san-luis-obispo-county-residents-test-positive-for-e-coli/) and information from the SLO County Department of Public Health. 805.life will continue to update this story as more details are confirmed.