Mycoplasma bovis eradication: MPI at 'tail end' of addressing infection 15 Mar, 2021 11:30 PM 3 minutes to read By Maja Burry of RNZ. The Ministry for Primary Industries is going back and taking a fresh look at some farms formerly infected with the cattle disease Mycoplasma bovis, to double check that all risk of infection has been found. M. bovis can cause lameness, mastitis and abortions in cows and was first detected in New Zealand by MPI in 2017, after a large number of cattle on a South Canterbury dairy herd began displaying symptoms. Since then 262 farms have been confirmed as having M. bovis.