10:38AM May 27, 2020
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If not, the deworming treatment was a failure and should be investigated with your veterinarian to determine if improper dosing and/or resistance has affected the outcome.
The following can happen due to subclinical worm infections:

  • Decreases in feed intake, average daily gain and milk production
  • Poor immune response to viral vaccines and diseases
  • Resistance to dewormers may keep increasing

To see if your deworming program is at least 90 percent effective, work with your veterinarian to conduct a Fecal Egg Count Reduction

Merck Combination

* Merck Animal Health maintains the world’s largest FECRT database to monitor field use efficacy of anthelmintic classes. Through 2018, there were 24,186 samples were analyzed – 12,171 pre-treatment and 12,015 post-treatment.

1. Dobson R., Jackson F., Levecke B., Besier B., et al. Guidelines for fecal egg count reduction tests (FECRT). World Association for the Advancement of Veterinary Parasitology
(WAAVP) (2011) Proceedings: 23rd International Conference of the World Association for the Advancement of Veterinary Parasitology.

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