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The term ‘Refugia’ can be really confusing! The outcome we want is to stop your farm from becoming dominated by drench-resistant worms. Using Refugia means leaving some worms free to breed without ‘screening’ by drench. There are various ways to achieve this.  … What is Refugia? The term Refugia means a worm population that can reproduce without being exposed to drenching.  Keeping a population (or refuge) of drench-susceptible worms on the farm can slow the build-up of parasites resistant (R) …

Worm Biology …

Broad-spectrum drenches … Narrow-spectrum drenches … Here you’ll find details on the different anthelmintic classes available in New Zealand – what worms they target, how they act, and what we know about drench resistance for each class.  … What’s in a name?   Drench is the common name for anthelmintic.  These kill certain species of internal parasites (worms) inside your animals.   Dozens of drench BRANDS are available However they all belong to: Five 'broad-spectrum' drench families (cover …

Sheep breeding with most lambs sold store or grown out elsewhere … Sheep breeding and finishing on same feed platform … Lamb finishing on ‘clean’ feed … Lamb trading on permanent pasture only … Learn about how different farm systems and policies set up different levels of risk – both for worm challenge, and for drench resistance. We also highlight some management ideas and risk mitigations. … Good nutrition is #1  No matter what systems are in place on a farm, very good nutrition greatly …