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The Animal and Plant Health Agency assisted with investigations into two raw milk-linked outbreaks in the UK during the second quarter of 2026: one involving Cryptosporidium and one involving Shiga toxin-producing E. coli O26. Authorities did not disclose how many people became ill. In the STEC incident, a farm paused raw milk sales while measures were put in place and follow-up samples were found compliant.
The UK’s Animal and Plant Health Agency (APHA) assisted with investigations into two outbreaks linked to raw milk during April to June 2026, one involving Cryptosporidium and the other Shiga toxin-producing E. coli O26. The agencies have not disclosed how many people were ill, leaving the scale of the incidents unclear.
In one incident, patients were epidemiologically linked to drinking unpasteurized milk, APHA said in information about its outbreak work. The farm associated with the incident suspended raw milk sales as a precaution while investigations were underway. Sales resumed after mitigation measures were implemented, including stronger quality assurance procedures and compliant results from follow-up milk sampling.
The report also describes a separate STEC O26 incident linked epidemiologically to an open farm. Recommendations included making soap at handwashing stations accessible to very young children and improving controls to prevent contact with animals in areas not designated for public interaction. The supplied information does not establish that this open-farm incident involved raw milk.
APHA assisted with 10 Cryptosporidium outbreak investigations in the quarter, including cases linked to raw milk and open farms. For the raw milk premises, Food Standards Agency dairy hygiene inspectors checked hygiene during milking and processing. In a separate farm investigation, a lamb fecal sample contained Cryptosporidium parvum matching isolates from human cases; officials described this, alongside epidemiological findings, as strong evidence of a common source.
Raw Milk Risks and Farm Controls
The incidents matter because raw milk has not been pasteurized, a heat treatment used to reduce disease-causing microorganisms. The pathogens identified in the investigations can cause illness, and the source material links one outbreak epidemiologically to drinking unpasteurized milk. It does not provide case counts, severity information, or details about any hospitalizations.
The response also shows how outbreak investigations can affect food sales and farm operations. The implicated farm’s temporary pause in sales was precautionary; it resumed after mitigation steps and compliant follow-up milk sampling. That account describes action at one farm, not a general change to UK raw milk rules or evidence that all raw milk products were affected.
The broader quarterly figures point to risks at visitor farms as well as in food. APHA said eight of the nine Cryptosporidium outbreaks that began in the quarter were linked to open farms with animal-contact activities, while one was linked to unpasteurized milk. Those figures concern the Cryptosporidium investigations, not the two raw milk outbreaks as a combined count.
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Quarterly Outbreak Investigations
APHA provides assistance with human outbreaks of cryptosporidiosis and E. coli infections when an animal-associated source is suspected and the UK Health Security Agency (UKHSA) requests support. The report says the two raw milk incidents were part of this work in the second quarter of 2026.
Cryptosporidiosis investigations commonly increase in the second quarter, according to APHA, as families and school groups visit open farms around Easter and public holidays. The agency identifies close contact with young ruminants, often lambs, as a high-risk activity for transmission of Cryptosporidium parvum. Bottle-feeding, handling, or prolonged contact such as cuddling can lead to exposure, including contamination of clothing.
APHA’s reported quarterly total was 10 assisted Cryptosporidium investigations. Nine involved C. parvum and the species or type was not identified in the other. Of the nine outbreaks that began in the quarter, six were in England and three in Wales. These are investigation counts and locations reported by APHA; they do not provide a count of affected people across all incidents.
“The implicated farm suspended sales of raw milk while investigations were ongoing.”
— Animal and Plant Health Agency
Case Counts and Incident Details
Neither APHA nor UKHSA disclosed how many people were ill in the two raw milk-linked outbreaks. The available account also does not give dates of onset, patient ages, illness severity, hospital admissions, or the geographic locations of the raw milk incidents.
The source does not specify whether investigators identified the precise route of contamination in either raw milk incident, nor does it provide the full laboratory findings for the STEC O26 investigation. The epidemiological link to milk is reported for one incident, but further details about how that link was established are not included.
The farm’s reported sales restart followed mitigation measures and compliant follow-up sampling. The information provided does not describe the sampling schedule, the measures in detail, or whether additional monitoring continued. It also does not identify a current public warning or say that sales remain suspended.
Monitoring and Farm Safeguards
The published account does not announce a new investigation milestone or a further update date. Follow-up described in the report includes milk quality assurance and sampling at the farm that paused sales, while food hygiene inspectors checked milking and processing conditions.
For open farms, APHA recommended practical steps such as accessible soap and controls that keep visitors from animal areas not intended for public contact. The agency also visited five open farms during the quarter to advise on disease transmission and the relevant industry code of practice. The source does not say whether additional visits or enforcement action are planned.
Further information from APHA or UKHSA could clarify case numbers, illness outcomes, and the investigations’ findings. Until then, the confirmed account remains limited to the pathogens, reported links, and response measures described by the agencies.
Key Questions
What pathogens were involved in the two raw milk-linked outbreaks?
One involved Cryptosporidium; the other involved Shiga toxin-producing E. coli O26, according to APHA’s account.
How many people became ill?
The number has not been disclosed. APHA and UKHSA did not provide case counts in the information reported.
Did the farm stop selling raw milk?
In the STEC incident linked epidemiologically to unpasteurized milk, the implicated farm paused sales as a precaution. Sales resumed after mitigation measures and compliant follow-up milk sampling, APHA said.
Were both STEC incidents linked to raw milk?
No. The report says one STEC O26 incident was epidemiologically linked to unpasteurized milk. A second STEC O26 incident was linked to an open farm; the account does not say that it involved raw milk.
What precautions did officials recommend at open farms?
Recommendations included making soap readily reachable by young children at handwashing facilities and preventing visitors from contacting animals in areas not designated for public interaction. APHA also warned that close contact with young ruminants can carry Cryptosporidium risk.
Source: foodsafetynews.com
