Australian Health Minister Nicola Roxon said on Sunday the government expected the health authorities to announce more cases of A/H1N1 flu later in the day.

With two more cases adding on the list, a total of 16 cases of the A/H1N1 virus have been confirmed in Australia so far.

Roxon said with quicker testing turnarounds, she anticipated that number would grow.

"We expect to have a number (of suspected cases) further confirmed later today," she told the Nine Network on Sunday.

The Victorian health authorities confirmed Australia's 16th A/H1N1 flu case and the state's 11th on Sunday when a 15-year-old boy from Melbourne's northern suburbs was diagnosed with the disease.

Roxon said it was a concerning development in the spread of the virus.

"We do have a slightly worrying development in that we have several cases where we cannot identify where they might have got the disease from," she said.

"They're not travelers; they're not immediate contacts of confirmed cases."

But, Roxon said, it was unlikely the disease had been lying dormant in Australia long before its worldwide outbreak last month.

(Xinhua News Agency May 24, 2009)