Category: Our Blog


Recently one of our clients at Horsemen’s Laboratory asked about the accuracy of our testing methods. Horsemen’s Laboratory was established in 1991 and since then we have tested over 66,000 samples. In addition, we have sent samples to the University of Illinois, School of Veterinary Medicine Department of Parasitology and to East Tennessee Clinical Research,… Read more »


A client recently asked, “How effective is Diatomaceous Earth as an agent to prevent or control worms in horses?” Here’s what Horsemen’s Laboratory has found through performing fecal egg counts on horses that are being fed Diatomaceous Earth. In horses that are high shedders, the egg count is often fairly high, 500 strongyle eggs/gm of… Read more »

Review of the Biology and Control of Oxyuris equi (pinworms)

This is a summary of an article that was written by Dr. C. R. Reinemeyer and Dr. M. K. Nielsen and was published in EQUINE VETERINARY EDUCATION.  This article reviews essential features of the biology, epidemiology, pathology, diagnosis, and control of Oxyuris equi (pinworm) infections, and describes the current status of recent biological adaptations.  You… Read more »

Re-Evaluate Your Deworming Protocols This Fall

by Dr. Kenton Morgan, senior veterinarian, Equine Technical Services, ZoetisWhen did you last deworm your horse? What parasites did you deworm your horse against? If you’re not sure, it may be time to re-examine how you approach your equine deworming program. Deworming every horse every couple of months was common practice for more than 40… Read more »

The Ten Commandments of Equine Parasite Control

Dr. Craig R. Reinemeyer and Dr. Martin Nielsen have come up with the 10 Commandments of Equine Parasite Control.  Many of these “commandments” seem counter to what I learned when I was in Veterinary School so long ago.  However, since the problem of worm resistance has remained a concern a new approach must be taken… Read more »

Controlling Parasites through Pasture Management

Written by Ann Jamieson, brought to you by Eastern Hay A constant problem in horses, parasites can result in unthrifty condition, ulcers, respiratory problems, anemia, chronic colic and even death. Yet with the development of de-worming products that can be given orally rather than by tubing, allowing more widespread and frequent use of de-wormers, parasite… Read more »