Drug resistance to multiple drugs and sometimes to all available drugs in parasites of goats is extremely common. In order to deliver effective treatments to their animals, it is recommended that producers learn which dewormers still work on their farms by doing fecal egg count reduction tests (FECRT, comparing before and after fecal egg counts) or having a DrenchRite® larval development assay (LDA) done. Several land grant universities now offer low cost ($5/sample) fecal egg counting for this purpose. For more information, go to https://www.wormx.info/lowcostfec . For information about the cost and availability of the DrenchRite test, send an email to firstname.lastname@example.org .
To improve the effectiveness of deworming treatments, it is now recommended that goats be given combination treatments. A combination treatment is when you give drugs from different classes to the same animal at the same time. It is important not to mix the different drugs together as they are not chemically compatible.They should be given separately, but can all be given at the same time, one right after the other. It is always recommended to treat goats selectively given their individual need for treatment based on FAMACHA© score and/or the Five Point Check©. Sometimes performance (ADG, milk production, litter size) is used as a criterion for deworming. This recommendation is even more important when using drugs in combination. If all animals in the herd are treated, resistance to the dewormers will develop rapidly, and if using a combination, there will be nothing left to use when this happens. Go to wormx.info for more information on drug choice and drug resistance.
This chart was originally developed by Ray M. Kaplan, DVM, PhD, DACVM, DEVPC (University of Georgia) with subsequent contributions by Patty Scharko DVM, MPH (Clemson University). It was last updated October 2021 by Michael Pesato DVM DABVP (Mississippi State University).
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