What Are The Main Parasites That Horses Get? Here Are The Top 4
Testing your horse before and after using a dewormer is crucial for determining if your deworming method is actually working or not. Many parasites have become immune to common de wormers and the FDA is putting in tough regulations on deworming drugs this year.
Strongyles: One of the most common types of internal parasites that affect horses is strongyles. These worms, including small strongyles (cyathostomins) and large strongyles (Strongylus vulgaris), can cause serious health issues. Strongyles are notorious for causing damage to the intestinal lining, leading to colic, weight loss, and poor coat condition. Routine fecal examinations are necessary to detect strongyle worm eggs in your horse's manure.
Roundworms (Ascarids): Young horses are particularly vulnerable to roundworms or ascarids. These parasites can grow up to several inches in length and can lead to stunted growth, respiratory issues, and even intestinal blockages. Foals are commonly infected by ingesting roundworm eggs while grazing or through contaminated environments.
Tapeworms: Tapeworms are another internal parasite that can affect horses, with the most common species being Anoplocephala perfoliata. These parasites reside in the small intestine and can cause colic, weight loss, and other digestive disturbances. Tapeworm eggs are not usually detected in routine fecal exams, so it's important to use a dewormer effective against tapeworms.
Pinworms: Pinworms (Oxyuris equi) are a nuisance for horses, especially in the perianal region. Infected horses may experience intense itching, tail rubbing, and hair loss. Unlike other parasites, pinworm eggs are not typically found in fecal exams. Therefore, it's important to observe the signs of infestation and consult your veterinarian for appropriate treatment.