The head of Biosecurity Australia, John Cahill, has come under attack from angry farmers for allowing potentially contaminated meat products into the country.
Mr Cahill has addressed a Rural Press Club function in Brisbane this morning.
Pig farmers are angry Biosecurity Australia allows pork imports from countries that have a disease known as PMWS.
Beef producers are also upset that Biosecurity Australia allowed beef to be imported from Brazil, where there has been an outbreak of foot and mouth disease.
Mr Cahill defended the pork import decision, saying it was based on scientific assessments.
But he said beef imports from foot and mouth countries have stopped, and independent risk assessment procedures are being reviewed.