Betta Maid has been shut down by the NSW Food Authority after traces of a rare strain of salmonella linked to a deadly outbreak were found in apple strudel and a chocolate slice.
On Thursday night, after finding salmonella on a food contact surface, the authority issued the Unanderra bakery with a prohibition order preventing it operating.
To date, one environmental sample from the bakery, as well as two samples of food produced by the bakery and taken from an aged-care facility have tested positive for Salmonella bovismorbificans.
That same rare strain was found in 31 infected residents at 10 aged-care facilities operated or supplied by IRT. Two of the residents have since died.
A spokeswoman for the authority confirmed it had cleared IRT of any involvement in the outbreak.
She said the Betta Maid prohibition order prevented it from trading until no further salmonella was detected at the bakery.
"The NSW Food Authority has been consistently monitoring and working with the company and its food safety consultant since it first detected pest and hygiene issues at the premises on 16 February as part of an investigation into suppliers of an aged-care provider experiencing a salmonella outbreak in its facilities," she said.
"As part of its continuing investigation, the NSW Food Authority continued to closely monitor and regularly inspect and test the bakery."
The spokeswoman said the prohibition order was issued after the authority again detected salmonella at the bakery on Thursday. It "was the first time salmonella had been detected at the premises since remediation work had been undertaken". Investigations into the bakery would continue.
"There have been no reports of illness in the wider community related to consumption of food from the bakery," the authority spokeswoman said.
"If anyone has concerns for their health, they should contact their health professional in the first instance."
The spokeswoman advised anyone with a food safety concern or complaint to contact their local council or the NSW Food Authority helpline on 1300 552 406.