Microbiologists say a new family of super bug resistant to nearly all antibiotics is spreading here and poses a "serious and urgent threat".
An article published today in the New Zealand Medical Journal says bacteria known as CPE pose an immediate threat to modern healthcare, as treatment options are "extremely limited or non-existent".
CPE are bacteria that produce an enzyme that deactivates a crucial class of antibiotics called carbapenems.
The genes that confer antibiotic resistance are easily spread between several species and strains of bacteria, particularly in hospital environments.
It was likely that CPE would become resistant to all known antibiotics "in the near future", the article's authors said.