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Genetic control of internal parasites


Selecting animals with the ability to resist and tolerate interal parasite infections is one of the best long-term strategy for managing internal parasite problems in small ruminants. Parasite resistance (usually quantified by fecal egg counts) is a moderately heritable trait and there is considerable within and between breed variability. Parasite resilience is less heritable, but is more easily estimated on the farm, using the FAMACHA© system and Five Point Check©. There are genetic correlations between fecal egg counts and FAMACHA© scores.


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Last updated 12.16.22

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