Rush to vaccinate little penguins against H5N1 as another seal is diagnosed

Bird flu has likely spread to a second seal, one day after the first mammal in Australia was confirmed to have contracted the virus.

Five suspected H5 bird flu cases were recorded in South Australia on Monday, including a long-nosed fur seal at The Pages Conservation Park, the state's Department of Primary Industries and Regions said in a statement on Monday morning.

The Pages — which covers two small islands between Kangaroo Island and the mainland — is a haven for the endangered Australian sea lion.

The fur seal has been tested for bird flu, with results expected in the coming days.

The first positive case of the virus in a mammal was confirmed on Sunday in a long-nosed fur seal at Beachport, 300km south of Adelaide, which authorities believed was contracted from wild birds.

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Before the new case was announced, Environment Minister Murray Watt said the spread from birds to mammals was inevitable and the government was examining whether further vaccination programs were needed.

"We are likely to see mass mortalities of birds and mammals, and I know that is a very distressing thing for Australians to hear. But we also need to be realistic," he told ABC TV on Monday.

"This is what we've seen happen overseas. Australia is very fortunate that we've been the last continent on Earth to have this strain of bird flu happen. But we are likely to see those kind of events as we have overseas."

Agriculture Minister Julie Collins said the federal government was investigating whether bird flu vaccines were available for use in mammals.

"There are trials underway in North America, in California and Hawaii, and this is using a vaccine that's been developed for cattle," she told ABC radio.

"There certainly is nothing commercially available, but we do continue to look at that research."

Bird flu vaccinations have been rolled out to at-risk species, including the little penguins on Victoria's Phillip Island.

Many were corralled into pens to receive the first of two vaccinations on Sunday night.