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Friday, 06 August 2021 06:55

M.bovis eradication plan on track - report

Written by  Staff Reporters
Mycoplasma bovis programme director Stuart Anderson. Mycoplasma bovis programme director Stuart Anderson.

New Zealand is on track to eradicate the disease Mycoplasma bovis (M. bovis).

That's the view of the independent Technical Advisory Group (TAG) which has been looking at New Zealand's response to the outbreak.

"The TAG report acknowledges the improvements to our work, which aim to lessen the impact on affected farmers, their whānau, workers and rural communities," says M. bovis programme director Stuart Anderson.

"I know that farmers who have been impacted have found the process challenging. Their contribution has not gone unnoticed or unappreciated, and four years on since the disease was first detected, immense progress has been made towards eradication. We now have just three active confirmed infected farms, compared to 34 farms two years ago."

The group found:

  • There have been notable improvements in the timeliness of tracing and casing of herds and management of confirmed infected herds since 2019.
  • Beef Surveillance and Bulk Tank Milk screening are working well.
  • There have been improvements in the recording of animal movements by farmers.
  • Thanks to operational improvements, the Canterbury cluster identified last spring was rapidly found and controlled.
  • Genomic information continues to support that bovis was likely introduced around late 2015 via a single source.

The TAG made 14 recommendations for the programme, all of which are accepted.

These include advice regarding monitoring of beef herds and non-milking dairy cows and what is required to move from deliminating to the provisional freedom of infection phase over the next year.

The TAG found that improvements to the programme meant it was in a good position to deal with any further infected farms identified, which was likely given some farms' previously poor recording of cattle movements and the likelihood that unidentified small pockets of infection may remain to be found.

Anderson said the TAG found the recent Canterbury cluster could most likely be explained by unrecorded animal movements, and they recommend the likelihood that the Five Star Feedlot could be a possible source of infection be examined closely.

"Since the TAG first considered information in December, we have looked into this property closely, tested animals and traced movements," he said.

“In the programme’s view there are more likely sources from within the cluster of infected farms itself, such as animal movements, shared grazing, insecure boundaries between neighbouring properties and sharing of dairy platforms.

“However, out of an abundance of caution, and in coordination with the feedlot’s owners, ANZCO, we’ve placed a buffer area around the feedlot that will remain free of cattle until it is cleared of M. bovis. This is on top of the already strict biosecurity measures that are in place and being adhered to.”

DairyNZ chief executive Tim Mackle said eradicating M. bovis has been a key goal for New Zealand and it’s pleasing to see the commitment by farmers is delivering.

“Managing M. bovis has been a significant challenge for our farmers and presented an upheaval for many who made sacrifices for the greater good,” says Mackle.

“Keep up the good work – record all cattle movements, ensure good biosecurity practice is in place on your farm and prevent any mixing of stock.”

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