Elephant seals in San Mateo County first tested positive for bird flu in February and the infection has now spread to other species, according to researchers.

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An avian flu outbreak, which killed several elephant seals at California’s Año Nuevo State Park last month, has spread to two other mammal species, according to researchers.

The cluster of infections appears confined to an area of San Mateo County, and no cases have been detected at Point Reyes National Seashore.

Experts are closely monitoring the marine animals, flagging mortalities and advising beach visitors to take extra precautions. Meanwhile, a Sonoma County poultry facility was struck by bird flu in ...

The snake bit him near the Quail Hill Community Center, the start of an approximately 2-mile trail, according to the Orange ...

The H5N1 bird flu outbreak in California elephant seals has spread to other marine mammals, including a sea otter and sea lion. But wildlife officials are hopeful the outbreak will remain contained.

Following news this week of a southern sea otter's death from avian flu, experts are now saying the disease's outbreak has infected more species of marine mammals along the San Mateo County coast.

Two weeks after scientists confirmed the first-ever outbreak of avian influenza, or bird flu, in elephant seals along the ...

Wildlife authorities confirmed Thursday that nine more elephant seals, a sea lion and an otter have died from bird flu at Ano Nuevo State Park in San Mateo County.

The avian flu outbreak is infecting more marine mammal species off the San Mateo County coast. Experts first spotted the disease among an elephant seal population last month. Now we know a southern ...

The avian flu outbreak that killed 30 elephant seals at Año Nuevo State Park last month, resulting in its partial closure and canceling tours for the season, has spread to at lea ...