(NEWSnet/AP) — A fourth farm worker has been infected with bird flu linked to dairy cows, health officials confirmed Wednesday.

The worker had direct contact with infected dairy cows on a northeast Colorado farm, state and federal health officials said. The man developed pink eye, formally conjunctivitis, received antiviral treatment and has recovered.

Three other cases of human infection linked to cows have been reported in dairy workers in Michigan and Texas since March. Two of those workers also developed pink eye, andone had mild respiratory symptoms.

In 2022, the first U.S. case of bird flu was detected in a Colorado farm worker exposed to infected poultry.

Centers for Disease Control and Prevention said the new infection does not change the agency's assessment that the risk to the public remains low. People with prolonged contact with infected birds or other animals, including livestock, or to their environments, are at higher risk.

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