Australia issued a warning on Monday regarding the potential for a broader spread of H5N1 bird flu following the first significant mortality event among seabirds, resulting in the death of approximately 50 greater crested terns near the coast south of Adelaide. While no evidence of the virus has been detected on Australian farms, many have implemented strict measures to protect poultry flocks since its initial identification in June.
Agriculture Minister Julie Collins confirmed the presence of H5N1 bird flu through testing conducted on a group of 49 deceased and 35 sick terns discovered during helicopter surveillance near Cape Jaffa, located 250 kilometers from Adelaide, last Friday. Collins emphasized the likelihood of increased spread and impact on wildlife due to this being the first confirmed instance of mass mortality linked to the virus in Australia.
Australia has reported a total of 74 confirmed cases across various states, with a concentration in South Australia, according to Collins. Both Australia and New Zealand have been preparing for the virus for years by implementing stringent biosecurity measures on farms, conducting tests on shore birds, vaccinating vulnerable species, and developing response strategies.
The H5N1 bird flu has caused substantial losses in bird and mammal populations worldwide, resulting in significant economic impacts for poultry farmers, infections in U.S. cattle, and the accumulation of bird and seal carcasses on beaches. Although H5N1 can be transmitted to humans through contact with infected animals, global human cases remain limited, and health officials assess the risk to humans as low.