The cow disease Mycoplasma bovis has been found in the North Island for the first time, says the Ministry for Primary Industries (MPI).
MPI has identified four new properties as positive for the bacterial cattle disease Mycoplasma bovis and strongly suspects one further property.
One of the latest infected properties is in the Hastings district, the other three are within a farming enterprise in Winton.
There is also a suspect property near Ashburton.
MPI's Director of Response, Geoff Gwyn says early indications are that all the properties have links with the Van Leeuwen Dairy Group (VLDG) - where the outbreak started - through cattle movements.