Biosecurity Queensland chief veterinary officer Dr Ron Glanville said it was now confirmed that the piggery near Dalby had positive results for the human pandemic (H1N1) 2009 influenza strain.

"The affected piggery has been under quarantine since yesterday after Biosecurity Queensland was alerted to the sick pigs on Monday," Dr Glanville said.

"Biosecurity officers are working with the owners to implement strict on-site biosecurity measures to ensure the virus remains contained.

"It is fortunate that no pigs have left the property recently and all steps are being taken to ensure the virus is contained and does not spread to other piggeries."

Dr Ron Glanville said nasal swabs and blood samples from pigs were collected on Monday after a private vet reported a large number of pigs in a shed of 450 were showing flu-like signs.

"The test results from the Australian Animal Health Laboratories in Geelong came back this morning," he said.

A case of human pandemic (H1N1) 2009 influenza was detected at a piggery in Northern Victoria last week and there was a previous case in New South Wales in July.

"QPIF is working closely with the piggery owner, Queensland Health, Australian Pork Limited, and the Federal Department of Agriculture, Fisheries and Forestry to ensure a coordinated response is in place," Dr Glanville said.

"The infection should be self limiting within the piggery and the response is designed to allow the disease to ‘burn out’ as quickly as possible."

* If you suspect swine influenza in your pigs contact Biosecurity Queensland on 13 25 23.