Authorities report that highly pathogenic H5N1 bird flu spreads across state borders into South Australia. Multiple outlets say the development follows the initial detection of the deadly H5 strain in Western Australia about a week earlier. The latest updates confirm the virus has crossed into South Australia, marking a change from the earlier containment to Western Australia.

Across reports, the number of birds killed by the H5N1 strain is stated to have risen to four. The articles describe this as a worsening situation as the virus moves beyond its initial detection location. While the coverage focuses on the spread and the rising death toll among birds, it does not detail specific species, locations within South Australia, or any human cases.

The reports also describe the spread as “interstate,” reflecting movement from Western Australia across state lines. Overall, all accounts align on the key points: H5N1 is confirmed in South Australia, the earlier detection was in Western Australia, and the bird death toll linked to the H5N1 strain is four.