Foodborne illness investigations tied to unpasteurized dairy continue to test public health agencies across the U.S., even as federal officials say raw milk can carry pathogens including Campylobacter. In Idaho, state health officials said on June 3 they are investigating two outbreaks likely associated with raw milk after nearly 60 people became ill.
Idaho says two milking operations are tied to the investigation
The Idaho Department of Health and Welfare said it is working with local and state partners to investigate a recent increase in illnesses after people consumed unpasteurized, or raw, milk. In the agency’s June 3 announcement, Idaho said nearly 60 people had been identified as sick since May 19, 2026, and at least 45 of them tested positive for campylobacteriosis, a bacterial infection. The department also said not everyone who became ill was tested, meaning the case count under review could still change as interviews continue.
State officials said most sick people reported consuming raw milk from two different milking operations, one in northern Idaho and one in southern Idaho. The Idaho Division of Public Health said it is working with Panhandle District Health, Southwest District Health, Central District Health, Southeastern Idaho Public Health, South Central Public Health, and Eastern Idaho Public Health on the response. The department said additional illnesses may still be identified as the investigation continues.
No FDA recall number, recall initiation date, or hazard classification has been announced in connection with this Idaho investigation. State officials also have not released product names, package sizes, UPCs, lot codes, or a public list of retailers because the investigation is still focused on identifying possible batches of concern and testing milk samples.
What is confirmed in Idaho, and what has not been released
The confirmed geography so far is Idaho, with the investigation spanning both northern and southern parts of the state rather than a single city or county. The state has not publicly named the two milking operations involved, and it has not released a city-by-city breakdown of illnesses. It also has not said whether any product was distributed outside Idaho, so there is no confirmed multistate distribution list to report at this stage.
What Idaho has confirmed is that both operations are working with the Department of Health and Welfare and local public health agencies to identify and fix potential sources of contamination. The state said milk samples are being tested and investigators are trying to identify batches of concern. As of the CDC’s June 24 update to its current outbreaks page, the agency listed zero active multistate Campylobacter investigations, indicating this Idaho event had not been posted there as an active multistate CDC investigation at that time.
Because no recall has been announced, officials have not issued product-specific return-or-discard instructions tied to a named brand. Idaho’s public statement instead said anyone experiencing symptoms after consuming raw milk or raw milk products should promptly seek medical care. The state also directed people seeking more information or wanting to report an illness to contact their local public health district.
Why Campylobacter in raw milk remains a recurring public health issue
The broader context for this investigation is that raw milk is not pasteurized, and public health agencies have long said pasteurization kills nearly all germs that can be present in milk while preserving its nutritional value. The CDC says raw milk can expose consumers to pathogens including Campylobacter, E. coli, Listeria, Salmonella, Brucella, and Cryptosporidium. In its Idaho statement, the Department of Health and Welfare said raw dairy products can make people sick, particularly young children, pregnant women, older adults, and people who are immunocompromised.
Idaho officials described common symptoms of campylobacteriosis as diarrhea, sometimes bloody, fever, stomach cramps, nausea, and vomiting. The department said symptoms usually begin two to five days after exposure and last about one week, though some complications can continue longer. The CDC’s current case definition similarly describes Campylobacter infection as typically causing diarrhea, abdominal cramps, fever, and nausea, sometimes with vomiting.
For Idaho residents, the practical takeaway is limited but clear: the state is still investigating, no public recall has been posted, and no comprehensive product list has been released. Until officials identify batches of concern or announce additional action, the most concrete update is that two Idaho raw milk operations remain under investigation and health agencies are continuing interviews and sample testing.