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About the Mycoplasma bovis (M. bovis) programme

Find out about the purpose, phases and history of the M. bovis programme.
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New levy rates from 1 October 2025

The M. bovis cattle levy will decrease by 50% to:

  • 0.4 cents (plus GST) per kilogram of milk solids produced in New Zealand by a dairy farmer for supply to a dairy processor
  • 40 cents (plus GST) per head for beef cattle slaughtered.

Purpose of the M. bovis programme

The M. bovis programme aims to:

  • contain and control M. bovis in New Zealand, and ultimately prove confidence that M. bovis is absent in our national cattle herd
  • reduce the impact of the disease and the programme for everyone affected by M. bovis
  • strengthen New Zealand's biosecurity system.

Three phases of the M. bovis programme

The M. bovis programme started in 2018 and is estimated to finish in 2028.

We need to pass through 3 phases to provide confidence that M. bovis is absent in our cattle herd.

  1. 1 Delimiting — in this phase, we identify and remove cases of infection.
  2. 2 Provisional absence — in this phase, we focus on monitoring the cattle population through background surveillance. We need 2 consecutive clear spring and 2 consecutive clear autumn calving periods to build up a good level of confidence that M. bovis is no longer present.
  3. 3 Confidence of absence — in this phase, background surveillance continues until we achieve a very high level of confidence that M. bovis is eradicated. This phase is expected to run for 2 years. The confidence of absence phase ends with a statement of absence and M. bovis is then considered exotic.

Diagram titled 'Phases of the Mycoplasma bovis programme’. Along the bottom is a horizontal dotted timeline that runs from 2018 to 2028 – the estimated 10-year programme span. Above this are the 3 phases of the programme, from left to right: delimiting, provisional absence and confidence of absence. At the right-hand end, it says statement of absence. A ‘We are here’ label indicates we are nearing the end of the delimiting phase.

Origin of M. bovis in New Zealand

In July 2017, a vet identified M. bovis for the first time in New Zealand at a property in South Canterbury.

Evidence suggests that the M. bovis found in New Zealand spread from a single case, which probably entered the country in early 2015. We may never know exactly how this happened, but the most likely route is through imported bovine semen. To find out more about this, the Ministry for Primary Industries (MPI) and industry partners are running a project to test bovine semen imported into the country before May 2022.

M. bovis imported bovine semen testing project

A new Import Health Standard for bovine germplasm took effect in May 2022, which improved risk management. The risk of M. bovis spreading through imported bovine semen is now considered very low.

Establishing the M. bovis programme

In 2017, MPI took action to contain M. bovis and set up a response under the Biosecurity Act 1993.

In May 2018 — after consultation with industry — MPI, along with DairyNZ and Beef + Lamb New Zealand, agreed to enter a Government Industry Agreement partnership to jointly manage and share programme costs. They did this because achieving confidence of absence was technically possible. Also, allowing M. bovis to spread would risk animal welfare and cost the farming sector about $1.3 billion in lost productivity in the first 10 years, with continued losses after that. In comparison, the estimated cost of the programme was $870 million over 10 years.

In late 2023, the day-to-day operational and disease control functions of the programme moved from MPI to OSPRI.

In early 2025, the programme framework changed to a National Pest Management Plan (NPMP). An NPMP — the same framework used for bovine TB — allows OSPRI to administer and manage the programme for the remainder of the plan.

M. bovis programme funding structure

M. bovis programme funding is split between government (68%) and industry (32%). Of the industry share (collected through farmer levies):

  • dairy farmers pay 94%
  • beef farmers pay 6%.

The split between dairy and beef farmers reflects the proportionate risks and benefits to each industry.

How the programme is administered changed in 2025, so we are working with MPI and industry to write up a new funding agreement.

Maximum and actual rates of NPMP levies are set as follows.

For dairy:

  • A maximum rate of 1 cent per kilogram of milk solids produced in New Zealand by a dairy farmer for supply to a dairy processor.
  • An actual rate of 0.8 cents per kilogram of milk solids produced in New Zealand by a dairy farmer for supply to a dairy processor, which took effect from 1 January 2025. This is expected to decrease in future.

For beef:

  • A maximum rate of 80 cents per head for beef cattle slaughtered.
  • An actual rate of 80 cents per head for beef cattle slaughtered, which took effect from 1 June 2025. This is expected to decrease in future.