“Public health officials in several states are investigating a multi-state outbreak of Salmonella illnesses linked to contact with backyard poultry,” the CDC said. “Any backyard poultry can carry Salmonella germs that can make you sick. Always take steps to stay healthy around your flock.”
Michigan reported the highest number of illnesses, six, followed by Ohio and Wisconsin, with five each.
Health officials warned that the outbreak had likely affected more states and that actual case numbers may be higher than reported.
Many people recover without seeing a doctor or getting tested, and it can take three to four weeks for cases to be confirmed, the CDC said.
Of 27 people with clinical data, 13 have been hospitalized. Patients ranged in age from under 1 year old to 78, with an average age of 12.
Children under 5 accounted for 41 percent of cases.
Investigators found that contact with backyard poultry, such as chickens and ducks, is the source of the outbreak.
Of 29 people interviewed, 23, or 79 percent, had contact with backyard poultry the week before getting sick.
Traceback data shows 13 of 14 poultry owners got birds since Jan. 1, 2026, often from retail farm supply stores.
Lab testing using whole-genome sequencing found the bacteria from patients were closely related, suggesting a single source. Samples taken from backyard poultry in Ohio matched the outbreak strain.
The outbreak strain shows some antibiotic resistance, especially to fosfomycin, the CDC said.
Poultry can carry Salmonella even if the animals seem healthy. People can get infected by touching birds, eggs, or contaminated surfaces and then touching their mouth or food, the CDC said.
Symptoms include diarrhea, fever, and stomach cramps. They usually start six hours to six days after exposure. Most people recover in four to seven days without treatment, but young children, older adults, and people with weak immune systems are at higher risk for severe illness.
The CDC urges precautions when handling backyard poultry: wash hands with soap and water after contact, keep birds and supplies outside the home, and avoid kissing or snuggling birds.