Authorities in San Mateo County are asking people to take precautions after two cases of bird flu were detected there. The first case was in a backyard poultry flock in the city of San Mateo. Then, most recently,

San Mateo County public health officials reported finding H5N1 bird flu in a pet cat and a backyard poultry flock.

REDWOOD CITY — A stray cat in San Mateo County recently tested positive for bird flu, officials said Thursday. The case is not related to an H5N1 incident involving a backyard poultry flock in San Mateo, according to the county executive’s office.