Deadly H5N1 Strain Arrives on Australian Mainland
The highly pathogenic H5N1 strain of bird flu has been detected on the Australian mainland for the first time, prompting authorities to issue warnings for pet owners. The virus, which has killed millions of birds and thousands of marine mammals globally since 2021, was confirmed in a giant petrel at Quindalup on Western Australia's south-west coast on Saturday. This marks Australia's fourth confirmed case, with three in WA and one in South Australia. A suspected positive detection in another giant petrel at Roses beach, 30km west of Esperance, was pending confirmation as of Sunday.
Risk to Pets: Cats, Dogs, and Backyard Birds
According to the Australian government, the virus can be fatal for cats and dogs, though infections overseas have been "infrequent" and typically result from exposure to sick or dead birds, infected animals, or consumption of raw pet food or unpasteurised milk. Dr Anne Quain, a veterinarian and senior lecturer at the University of Sydney, told Guardian Australia that H5N1 is "highly pathogenic" and there are no vaccines for cats or dogs. "The infection can cause respiratory or neurological signs," she said. "There are reports of fatalities in cats and (less commonly) dogs elsewhere in the world."
Authorities Urge Precautions
Threatened species commissioner Dr Fiona Fraser urged the public to avoid touching sick wild birds and to keep pets away from them. "Pet cats and dogs which come into contact with sick birds could capture H5 bird flu themselves," she said. "And it's generally good practice to keep your pets away from wildlife anyway." The federal government's analysis identified more than 150 native bird species and over 10 mammal species, including sea lions and fur seals, as being at "very high risk" of extinction or major decline if infected.
Symptoms of Bird Flu in Pets
The Australian government warns that signs of the disease "may be subtle or mistaken for other illnesses." Symptoms vary by species but can include fever, lethargy, discharge from eyes or nose, difficulty breathing, and neurological signs such as tremors or seizures. Dr Diana Barker, president of the Australian Veterinarian Association, advised bird owners to isolate suspected cases and call clinics rather than bringing the bird in to minimise spread. "Right now, the risk to common household pets in Australia is low, and there is no cause for alarm," she said. "However the public must remain vigilant."
Keeping Pets Safe: Indoor Cats and Leashed Dogs
Sean Dooley from BirdLife Australia recommended keeping cats indoors generally for bird safety, and especially during an outbreak. Dog owners should keep dogs on a leash at the beach, particularly along the southern coast and after heavy storms. "If we do find a bird flu spread here then there is going to need to be a change in behaviour if people want to protect their pets," he said. Dr Quain added that owners should minimise exposure to wildlife, avoid leaving pet food or water where wild birds can access it, and shower and change clothes after contact with sick or dead birds before interacting with pets.
