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Milk Testing for Tankers to Stop Cattle Disease Spread

02 August 2017

NEW ZEALAND - The disease, mycoplasma bovis, has been found on two separate properties owned by the Van Leeuwen Dairy Group in South Canterbury, who have 16 farms in the region.

Radio NZ reports that Ministry for Primary Industries' Director of Response Geoff Gwyn said it had decided to do a national bulk milk survey.

"It will be similar to the one done in 2007. It will look at sampling bulk milk tankers across New Zealand... which will give us a sense if there is any spread across New Zealand.

"We're hoping to have that up and running towards the end of next week."

The 2007 survey tested 244 tankers, and this test would be similar, Mr Gwyn said.

"In order for us to be statistically valid, what we'll be looking at is the amount of dairy farms in different regions... and choosing a sample size that will give us a level of confidence that the testing we do will show that there is no disease presence."

Mr Gwyn said there was no such thing as 100 per cent confidence in a test.

"There is no such thing as a zero degree of prevalence, but if I look at the last survey it was around 99 per cent confidence that there was a less than two percent prevalence."

Further Reading

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