Biosecurity Queensland is calling for cattle producers to send away samples of maggots they find on livestock, to prevent the spread of a dangerous parasite.
The screw-worm maggot is different to the normal variety as it feeds on live animals.
Senior veterinarian Dr Greg Williamson says while there have been no cases recorded in Queensland, the maggots or flies could potentially spread from neighbouring countries.
"It's found directly to the north of us in our northern neighbours, Papua New Guinea and in Indonesia," he said.
"It could be blown across in the wind or it could be carried across in ships, particularly returning livestock vessels - vessels that have taken livestock across to Indonesia and are coming back.
"This is a particularly little vicious little blowfly - it's not like the maggots that you know.
"You're probably familiar with the maggots of an ordinary blowfly - they will eat dead meat basically - but the screw-worm fly maggot will actually eat live meat, so they can be quite damaging."