Bird flu prompts US dairy farmers to ban visitors, chop trees

North Carolina on Wednesday became the seventh state to report an outbreak of highly pathogenic avian influenza (HPAI) in a dairy herd, after the U.S. Department of Agriculture confirmed infections in Texas, Kansas, Ohio, Michigan, Idaho and New Mexico.

While the first cases appear to have been introduced to herds in Texas and Kansas by wild birds, the USDA said transmission among cattle was also possible. Agricultural officials in Michigan and Ohio said infected herds in those states received cattle from Texas.

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