Jamie Mackay: The Country host on Mycoplasma bovis being found on a Canterbury dairy farm - Heather du Plessis-Allan Drive

In a blow to New Zealand farmers everywhere, MPI discovered Mycoplasma bovis in Canterbury's Selwyn.

It's just months after the announcement the country had no known cases of the cattle disease.

A standard bulk tank-milk background screening picked up the infection.

The Country's Jamie Mackay says the news that 1000 dairy cows will have to be culled will be devastating for the farmer impacted.

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