A variant of H5N1 bird flu that has circulated widely in wild birds — and in several instances led to severe illness in several humans — has turned up in dairy cattle for the first time.

The findings were relayed in a short update from the U.S. Department of Agriculture, which traced the new variant back to dairy herds in Nevada.

The variant, known as D1.1 genotype, belongs to a different genetic lineage than what’s fueled the infections in dairy cattle over the past year.