New Zealand Dairy Industry Reduces Antibiotic Use for Sustainable Farming

New Zealand dairy farmers are recognized for their minimal use of antibiotics, a practice that is receiving further attention due to concerns about antimicrobial resistance. Efforts are underway to enhance sustainable dairy production and protect herd health. A notable shift from blanket antibiotic dry cow therapy (DCT) to selective DCT is being supported by recent research findings.

The research indicates that only herds with a bulk milk somatic cell count (BMSCC) above 250,000, which rises by more than 50,000 in the last three months of the season, benefit from blanket DCT. This condition is reportedly applicable to fewer than 5% of herds. For other herds, selective DCT combined with internal teat sealants is recommended to minimize new infections.

Mitch Cooper, a veterinarian and senior technical and policy advisor at DairyNZ, emphasizes the importance of selective DCT, using clinical mastitis records, herd test results, and rapid mastitis testing at dry-off as primary data sources. Additional diagnostics from milk testing of infected cows can also support these decisions, acting as supplementary tools.

The role of veterinarians is also evolving, with new prescribing guidelines reflecting the latest evidence, ensuring that the right cows receive the appropriate treatment. Close collaboration with vets is highlighted as crucial for optimal treatment outcomes.

This strategy aligns with the industry's proactive measures to safeguard animal health and avoid resistance issues similar to those encountered in the sheep sector with triple drenches.