SYDNEY - AUSTRALIA'S swine flu outbreak hit sports events on Tuesday as a national swimming competition was axed and rugby league's first case put fixtures in doubt.

With the country's tally at 1,211 cases, Swimming Australia said it was shelving this month's Grand Prix in Melbourne, capital of Victoria state which has borne the brunt of the epidemic.

'Swimming Australia has a duty of care in relation to our athletes, as well as ensuring we give them be the best chance possible to prepare for the World Championships in Rome,' said Mr Kevin Neil, the body's chief. 'It is a regrettable decision to have to make, yet one that we have made with all the information available.'

Health Minister Nicola Roxon called the decision to call off the June 20-12 meet, which may be rescheduled for later in the year, 'regrettable.'

'I would urge those who are organising their events to make sure their decisions are based on medical advice and the nature of course of the event to be held,' she said.

Meanwhile concern grew over rugby league fixtures after Queensland forward Ben Hannant was diagnosed with swine flu following last week's State of Origin match in Melbourne.

Six of Hannant's Brisbane team-mates were placed in quarantine while two of his fellow Origin players were ruled out of a match on Monday. On Tuesday, Wests Tigers captain Robbie Farah was also isolated as a precaution.

National Rugby League chief David Gallop refused to rule out cancelling or postponing games if the situation worsens. 'It's a concern but as I said we can only take advice from the public health authorities and that's what we're doing,' Mr Gallop said.

Swine flu has spread rapidly in Australia, the world's fourth worst hit country, since sick passengers were allowed to leave a cruise ship in Sydney late last month.

World Health Organisation figures released on Monday showed more than 25,000 cases in 73 countries, including 139 deaths. -- AFP