A Wellington woman in her 20s has been confirmed as having meningococcal disease.
Health authorities say the woman was well enough to be discharged from Wellington Hospital on Monday.
It will not be known for a week what type of meningococal disease she has.
Regional health authorities are also investigating two more suspected cases of measles involving a child under five and an adult.
The latest confirmed case of measles in the region was on Friday last week and staff say it could lead to more secondary cases.