The National Burns Centre at Middlemore Hospital has had to limit patient admissions following several cases of drug-resistant infections.
Three patients have been infected at the South Auckland hospital since December.
On December 10 one case of carbapenem-resistant organisms (CRO) was identified at the centre. Carbapenems are a powerful group of antibiotics often relied on for infections where treatment with other antibiotics have failed.
Another patient in the burns/ICU unit was found to be infected on January 9 and a third patient identified on February 3.
Acting chief medical officer Vanessa Thornton said the multi-drug resistant organisms were often detected and managed in hospitalised patients. However this was a unique organism, believed to have been acquired overseas.