She said it was particularly concerning because burns patients were very vulnerable. The majority of patients and the visiting public are not at any risk.
"CROs can have serious implications for patients such as burns patients and we are taking all the necessary steps to ensure these cases are contained, managed and eliminated before they spread further.
"All three infected patients are in isolation and one theatre has been reserved for their exclusive use. Restricting the transfer of patients to the burns/ICU is a crucial step in eradicating these organisms," Thornton said.
Patients with burns will now be treated by regional burns centres until the risk is contained at the NBC. Very serious burns cases may be transferred to Australia on a case-by-case basis, Thornton said.
"Patient safety is paramount and these alternative arrangements are being put in place to ensure the protection of our most vulnerable burns patients."