The poultry industry is on high alert after South Australia recorded its first case of the highly contagious bird flu.

One of the nation’s biggest chicken producers has locked down its west coast farms as a second case of the deadly H5N1 bird flu was confirmed in Western Australia.

The desperate effort to prevent a bird flu outbreak has widened, with authorities testing two dead seabirds found in South Australia.

Two dead seabirds are being tested for bird flu in South Australia.