CDC confirms flu cases from Butler County Fair match H3N2v swine flu strain


COLUMBUS — The Centers for Disease Control and Prevention (CDC) confirmed Aug. 2 that nine of 10 suspected influenza cases in Butler County have tested positive for the H3N2v strain. The 10th case is still being tested.

The Ohio Department of Health (ODH) and the Butler County Health Department are actively investigating human illnesses associated with the Butler County Fair. The strain matches the flu virus that recently infected four people with swine exposure at a county fair in Indiana.

All individuals in Butler County’s investigation also had direct contact with swine but none are currently hospitalized.

Butler County Health Department continues to collect information and is working with ODH and CDC to determine the extent of the illnesses.

On alert

The Ohio Department of Agriculture is asking fair exhibitors to take precautions and is alerting attending veterinarians to closely monitor swine as they arrive on the fairgrounds for signs of influenza.

Influenza viruses such as H3N2 and its variants are not unusual in swine and can be directly transmitted from swine to people and from people to swine in the same way that all viruses can be transmitted between people.

All fair animals, especially pigs, are monitored for illness and signs of flu-like symptoms and are checked by veterinarians every day they are at the fair. This is to protect the health of both the people visiting the fair and the other animals in the barns.

When humans are in close proximity to live infected swine, such as in barns and livestock exhibits at fairs, movement of these viruses can occur back and forth between humans and animals.

Safe to eat pork

Influenza viruses cannot be transmitted by eating pork or pork products.

Individuals should always wash hands with soap and water before and after petting or touching any animal. Never eat, drink, or put anything in your mouth in animal areas. Older adults, pregnant women, young children, and people with weakened immune systems should be extra careful around animals.


Ohioans who have direct, routine contact with swine, such as working in swine barns or showing swine at fairs, and have experienced cough or influenza-like illness should contact their health care provider or local health department.

Symptoms include cough, sore throat, fever, body aches, and possibly other symptoms, such as nausea, vomiting, or diarrhea.

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