SACRAMENTO, the United States -- California's battle against avian influenza A (H5N1) intensified amid spreading infections across dairy farms and a growing number of human infection, including two newly confirmed cases in Stanislaus and Los Angeles counties.

California officials have declared a state of emergency over the spread of bird flu, which is tearing through dairy cows in that state and causing sporadic illnesses in people in the U.S.

California officials have declared a state of emergency over the spread of bird flu, which is tearing through dairy cows in that state and causing sporadic illnesses in people in the U.S. That raises new questions about the outbreak of the virus,

At least 65 human cases of H5 bird flu have been confirmed this year, with the majority being detected in California.

Los Angeles County health officials reported the first human case of bird flu in the area less than a week after a statewide emergency declaration was announced.

Public health officials have confirmed the first human case of H5N1 bird flu in Los Angeles County this year. A statement released on Monday said that the infected person, an adult, was exposed to infected livestock while at a worksite.

The LA County Department of Public Health confirmed the first human case of bird flu in the county, just days after Gov. Gavin Newsom issued a state of emergency over the disease.

Residents who fed their pets the recalled products or other raw meat or dairy products and observe symptoms should immediately contact a veterinarian.

A human case of the bird flu has been confirmed in Stanislaus County, according to health officials. Stanislaus County Public Health, California Department of Public Health, and the Centers for Disease Control and Prevention reported the bird flu (H5N1 avian influenza) in a county resident who had contact with infected dairy cattle.