Another farm with the cattle disease mycoplasma bovis has been added to the growing list.
The Ministry for Primary Industries has confirmed a new farm is infected within the Ashburton area.
It brings the total of active infected properties to 28.
In total, 33 properties have been confirmed infected, however the ministry has merged several farms and culled stock from others.
The latest, a dairy farm linked to other infected properties, was already under movement restrictions.