A Northland beef herd that tested positive for Mycoplasma bovis has been culled and the property is going through cleaning and disinfecting process.
The property with 50 animals in Arapohue, just east of Dargaville, was placed in lockdown by the Ministry of Primary Industries (MPI) in September and arrangements made with the farm owner to cull the stock.
Ten properties, including the infected farm, are now under a Notice of Direction (NoD) and another on Restricted Place Notice in Northland.
That's two more farms since the beginning of November when eight properties in Northland that may pose a risk of spreading M. bovis were issued with NoDs.
MPI will not say where the 10 farms are or when the notices were issued, citing privacy. The NoD aims to prevent further spread and doesn't restrict movement of stock or goods on to the farm.