Internal parasites are a major cause of lost production in livestock.

Parasite-killing drenches are an effective way of controlling parasites, but experts say some New Zealand farmers are using drenches in a way that will lead to drench-resistant parasites. And once present on a farm, parasite resistance to drench is permanent.

To combat this, Wormwise – an industry initiative aimed at developing a national worm management strategy – was established.

Wormwise manages and integrates research, education, communication and extension services for farmers, veterinarians, key influencers and retailers of anthelmintics.

Wormwise began in 2005 after a national survey of New Zealand sheep and beef farms revealed significant levels of anthelmintic resistance to internal parasites.

Its management group includes representatives from Agcarm, Beef + Lamb, Ministry for Primary Industries and the Veterinary Association.

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