Eliminating Parascaris equorum from a farm requires a strategic deworming program involving all horses out to pasture. Deworming is started when foals are seven to eight weeks old, and treatment is performed either daily or at two-month intervals, until the foal is about one year old.
Deworming treatments include pyrantel tartrate, which can be used for daily treatment, and medications that can be used at two-month intervals, such as ivermectin, pyrantel pamoate, and oxibendazole. However, many kinds of parasites are developing a resistance to certain medications, a veterinarian should examine all horses and foals on a farm in order to determine the types of parasites infecting the animals as well as an appropriate deworming schedule.
