MPI reports encouraging results as bulk milk testing nears final stage

Results from the current nationwide bulk milk testing for Mycoplasma bovis are encouraging after completion of around three quarters of the testing, Ministry for Primary Industries’ Mycoplasma bovis director Geoff Gwyn says.

So far, only three farms have been confirmed with Mycoplasma bovis through the milk testing, he says.

All three properties were already part of the ministry’s tracing programme and all have previously known links to the disease. One of these properties was under surveillance and the other two were about to go under surveillance.

Under the testing programme, milk samples from every New Zealand dairy farm are being taken shortly after calving, when cows are most likely to be shedding the bacterium.

For each farm, the first sample was collected around four weeks from the start of milk supply. Samples are then collected every two weeks, with a total of six samples from each farm.

More than 51,000 of the approximately 70,000 tests have been completed.

Nearly all farms have had three rounds of testing and around 10,000 farms have had four rounds. About 1,500 farms have completed all six rounds.

“The fact that we have confirmed Mycoplasma bovis on only 3 farms, and that all three of them were already on our radar, is encouraging,” Mr Gwyn says.

“It reinforces our belief that we are dealing with a single strain of Mycoplasma bovis, based on the available scientific evidence and our own work in the field.

“While this remains an extremely difficult time for affected farmers, and we still have a lot of work to do, I’m confident we are on the right path in terms of tracking down the disease and eradicating it from New Zealand.”

Full results from the bulk milk testing are expected to be delivered to the majority of farmers in the North and South islands in early December.

Source: Ministry for Primary Industries

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