The Australian Department of Agriculture, Fisheries and Forestry said on 23 August that testing at CSIRO’s Australian Centre for Disease Preparedness confirmed H5 high-pathogenicity avian influenza in a long-nosed fur seal found at Beachport, South Australia [E1]. DAFF called it the first detection of H5 bird flu in a mammal species in Australia [E1]. South Australia’s bird-flu update the same day repeated the first-mammal language and named the site [E2].
A member of the public reported the animal, found dead with no signs of injury, to the Emergency Animal Disease Hotline on Wednesday 19 August [E2]. State-based testing was inconclusive; samples went to ACDP for confirmation [E2]. No clade or genome was published in the departmental notes [E1][E2]. A WOAH page for this specific mammal detection was not retrieved by the freeze [E1][E2].
Both statements say the risk to human health remains low, and that there remain no detections in poultry or the agricultural production system [E1][E2]. The South Australian 23 August update also listed 11 new ACDP-confirmed H5 events since the previous day, including a little penguin on Kangaroo Island, a gannet, greater crested terns, a silver gull and a black-faced cormorant [E2]. South Australia’s confirmed H5 events were put at 194; national positive events around 298 [E2].
Sunday’s record is a named species, a named beach, a named lab, and an official first-mammal claim [E1][E2]. Whether DAFF or PIRSA later publishes a clade for the Beachport seal, and whether a second mammal appears on those pages, are later clocks [E1][E2]. The human-risk sentence is still “low” [E1][E2].