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MADISON (WKOW) – Experts say poultry owners should be mindful of recent outbreaks of a deadly strain of bird flu around the state.
The H5N2 virus, which so far has not been shown to be harmful to humans, recently infected a commercial flock of 200-thousand chickens in Jefferson County.
The same strain of the avian flu is also suspected to be behind recent outbreaks at a farm containing 126-thousand chickens in Barron County and a backyard flock of 40 different type of birds in Juneau County.
Dr. Paul McGraw, Wisconsin's State Veterinarian, said the state is still waiting on final testing results to confirm which strain of the flu was found at the latter, two cases.
“This is a highly pathogenic form of avian influenza,” McGraw said.
McGraw said the virus is likely transmitted through waterfowl like geese and ducks, who picked it up while migrating.
He said poultry at the three, outbreak sites has been quarantined. All of the birds there will eventually be de-populated, McGraw said.
McGraw said the USDA and DATCP work together on containing the virus and preventing its spread.
“We quarantine the farm. We work to get resources in to de-populate the farms that are affected, and then we have staff going out and contacting all the locations within 10 kilometers of those farms,” McGraw said. “We'll be testing birds at those sites to make sure it does not spread.”
“World, global trade agreements that are in place require us to eradicate those viruses, so we don't vaccinate for them,” McGraw said. “The risk is some of these forms could mutate into a form that could impact public health.”
Ron Kean, poultry specialist at UW-Extension, said those with poultry should work to keep their flocks isolated from waterfowl.
He also said poultry owners should be mindful of the fact that humans can carry the virus after coming into contact with other flocks.
“There's no evidence humans can get sick from this – at least at this time,” Kean said. “But humans can transmit it indirectly.”
“They can track things on their shoes, for example, from one flock to the next,” Kean said.
Kean said poultry owners should consider keeping a designated pair of boots on hand for wearing when interacting with their birds. He also said it's advisable for those with poultry to change clothes after being in contact with a different flock of birds.
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Wisconsin has confirmed its second and third outbreaks of a form of bird flu that's deadly to poultry.
The Wisconsin Department of Agriculture, Trade and Consumer Protection says they're a farm with 126,000 turkeys in Barron County and a backyard flock of 40 birds of different kinds in Juneau County. The Barron County farm belongs to Jennie-O Turkey Store.
The U.S. Department of Agriculture confirms the Barron County case is the same H5N2 strain that's cost Midwest and Ontario producers more than 2 million birds since early March.
The farms have been quarantined and the remaining birds will be killed to prevent any spread.
The H5N2 virus was first confirmed in Wisconsin at a chicken farm Monday.
Officials say it's not a risk to public health or the food supply.