Egg Count Reduction Test (ECRT) | Horse Wormer Resistance Testing

Egg Count Reduction Test (ECRT) for Horses

Our Egg Count Reduction Test (ECRT) is carried out 10 to 14 days after worming treatment to assess how effective your horse's wormer has been. This specialist equine parasite test measures the reduction in worm egg numbers following treatment and helps identify potential wormer resistance.

With increasing anthelmintic resistance in horses, an Egg Count Reduction Test is an essential part of any responsible worming programme. Identifying reduced effectiveness early allows horse owners to make informed decisions about future parasite control and helps preserve the effectiveness of available worming treatments.

Your ECRT results include the pre and post-treatment worm egg count, the calculated percentage egg count reduction, and a clear explanation of what the findings mean. We also provide practical recommendations if resistance is suspected, helping you develop an effective, evidence-based parasite control programme for your horse.

Results are typically available within 48 hours of receiving your follow-up sample.