NEW YORK (NEWSnet/AP) — A Michigan dairy worker has been diagnosed with bird flu, the second human case associated with an outbreak in U.S. dairy cows.

The patient had mild eye symptoms and has recovered, U.S. and Michigan health officials said. The worker had been in contact with cows presumed to be infected. Risk to the public remains low, officials said.

A nasal swab from the person tested negative for the virus, but an eye swab tested positive, indicating an eye infection, according to U.S. Centers for Disease Control and Prevention.

The first human case occurred in late March, when a farmworker in Texas was diagnosed. That patient also reported only eye inflammation and recovered.

As of Wednesday, the virus had been confirmed in 51 dairy herds in nine states, according to U.S. Department of Agriculture. Fifteen of the herds were in Michigan. Health officials have declined to say how many people exposed to infected cattle have been tested or monitored.

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