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Finding answers to antibiotic resistance concerns

  • Milk
  • Milk quality & production

Waikato farmer Margaret Davis was struggling with a high somatic cell count (SCC) issue, but an antibiotic resistance test combined with an animal health plan has put her herd back on track.

When Margaret Davis and her husband Stephen returned to their Ngātea farm seven years ago, the herd had a SCC problem, and they were concerned they had signs of antibiotic resistance with cows not responding to treatment for mastitis and several repeat cases.

Today the 250-cow herd, owned by Stephen and his brother Richard Davis, has come out the other side.

Working with veterinarians Arnica van der Wiele and Beth Belin, the herd’s SCC has dropped significantly and they are having better success with treatment.

Instead of blindly switching to a different antibiotic, Margaret teamed up with Arnica and carried out a DairyAntibiogram test to paint a clearer picture of what was going on.

The test provides antimicrobial resistance data from bulk tank milk samples collected by the milk processor and analysed for mastitis-causing bacteria. Those bacteria are then tested against antibiotics available in New Zealand for mastitis treatment.


The test places the herd on a scale. Bacteria in their natural, fully sensitive state are called ʻwild type’ and wild is what you want, Arnica says.

With the results in-hand, Arnica and Margaret sat down and came up with a comprehensive animal health plan. In addition to selecting appropriate treatments, Margaret made strategic culls, focused on good hygiene, and used vigilant mastitis testing on individual cows to match the right antibiotic to each case.

That’s the mindset shift the DairyAntibiogram test helps farmers make, Arnica says. Rather than assuming a stubborn case means the drug has failed, the test can confirm the drug still works – pointing instead to a cow or a management issue, Arnica points out.

“We don’t want to change the whole herd’s treatment because one cow isn’t responding,” she says.

“Without DairyAntibiogram, we are going in blind. With this test, vets can untangle what’s going on with bacteria on-farm and work with the farmer to find some practical solutions.”

DairyAntibiogram gives vets and farmers the evidence to use the right drug first and stick with a sound plan rather than constantly switching. It’s about responsible antibiotic use and protecting the drugs every farmer relies on.

“Margaret is proof that a farmer who’s motivated to do the right thing can make progress with the right information and back it up with a good plan.”
 


Article supplied by DairyAntibiogram