Two elderly people in NSW and Victoria have died after contracting listeriosis linked to contaminated smoked salmon from Tasmania.
The Australian Department of Health is also investigating a Queensland case of the infection, which is caused by listeria bacteria.
All three cases were in people aged over 70.
READ MORE
The pair who died also had "significant underlying health conditions" the department said on Wednesday.
Tasmania's Primary Industries Minister Guy Barnett said salmon products from the state were believed to be behind the three cases.
"The evidence that I've been provided from the department is that apparently that is the case," he said.