The most important reason for determining parasite fecal egg counts today is to test for resistance shared Martin Nielsen, DVM, PhD, DVSc, DACVM, DEVPC, when questioned about the importance of fecal egg counts. He addresses drug resistance, parasite species variability and tapeworms as growing concerns.
Source: EQUUS, March 2, 2025. Link.
We owe it to our horses to make sure the medications we are administering are 1) necessary, and 2) effective. Not testing is a major disservice to a horse.”