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.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 Australia is very fortunate that we've been the last continent on Earth to have this strain of bird flu happen