The Department of Health and Welfare (DHW) is working with local and state partners to investigate a recent increase in illnesses reported after consumption of raw milk.
Since Aug. 1, 2025, at least 23 cases of Campylobacter, including six children under the age of 12, and three cases of Shiga toxin-producing E. coli (STEC)infections have been reported in people who indicate that they consumed raw milk prior to becoming ill.
STEC is a type of E. coli that can cause very serious infections, especially in young children. Cases have been reported throughout Idaho, with multiple people seeking medical care and two requiring hospitalization after consuming raw milk from various brands.
People should be aware of possible health risks before consuming raw, unpasteurized dairy products or providing such products to family members, particularly people who might be at higher risk for illness, including young children, pregnant women, the elderly, and those who are immunocompromised.
What is raw milk?
Raw milk is unpasteurized milk from cows, sheep, goats or other animals. Pasteurization is a widely used process in which milk is heated to a specific temperature for a set time to kill harmful bacteria in the milk.
Raw milk can contain harmful bacteria, including Campylobacter, E. coli, Listeria, and Salmonella, all of which are killed during the pasteurization process. Infections with these bacteria can cause symptoms such as vomiting, diarrhea, abdominal pain, fever and dehydration. In some cases, particularly among people in high-risk groups, complications can be severe.
In Idaho, raw milk can be sold legally through multiple outlets, but it is not required to be tested for bacteria such as Campylobacter, E. coli or other disease-causing agents.
Anyone who has recently consumed raw milk and is experiencing symptoms is encouraged to seek medical care promptly. For additional information or to report an illness, contact your local public health district.
The Idaho Department of Health and Welfare is dedicated to strengthening the health, safety, and independence of Idahoans. Learn more at healthandwelfare.idaho.gov.