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

The discovery of bird flu in the San Mateo backyard flock prompted health officials to remind people to take biosecurity measures.

H5N1, known as bird flu, has been found in San Mateo County this week, according to state and local health officials. San Mateo County officials said Thursday that bird flu was found in a stray cat in Half Moon Bay.

H5N1, known as bird flu, has been detected in a backyard poultry flock in San Mateo County, the California Department of Food and Agriculture confirmed on Feb. 4.

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.

A case of H5N1 — known as bird flu — was detected in a domestic stray cat in Half Moon Bay, San Mateo County reported on Feb. 6. This is the first case of bird flu reported outside of chickens in the county.

Health leaders on the Peninsula are warning pet owners to be on the lookout for symptoms after a stray cat in Half Moon Bay came down with bird flu and had to be put down.

Authorities in San Mateo County urged residents to take precautions after two cases of bird flu were detected in the county.

After bird flu was detected in a stray cat in Half Moon Bay this week, health officials in San Mateo County are urging pet owners to contact a veterinarian if their pet shows any

After bird flu was detected in a stray cat in Half Moon Bay this week, health officials in San Mateo County are urging pet owners to contact a veterinarian if their pet shows any symptoms of the virus.