common in horses, worm comes out of rectum during dark hours and lays eggs around anus and then retreat back , mainly resides in the large intestine, horses are very itchy, get bristle brush looking tail from rubbing hind end on fence or trees. use tape technique.
pin worms
The worm that is commonly found in horses and causes the symptoms you have described is called the pinworm (Oxyuris equi). This type of worm is prevalent in horses worldwide and is more commonly found in animals that are kept in close quarters, such as in stables or horse shows.
One of the hallmarks of pinworm infestations is the presence of eggs around the horse’s anus. A tape technique can be used to confirm the diagnosis of a pinworm infestation. To perform this technique, a piece of clear tape is applied to the skin around the anus in the evening, when the pinworms are most active. The tape is then removed and examined under a microscope for the presence of eggs or pinworms.
To treat a pinworm infestation, the affected horse should be dewormed with an anthelmintic medication that is effective against pinworms. It is important to follow the recommended dosage and administration instructions for the dewormer, as underdosing may contribute to the development of resistance among the pinworm population.
In addition to deworming, good management practices can also help control pinworm infestations. This includes minimizing overcrowding, maintaining good hygiene in stables and other horse-keeping facilities, and regularly cleaning and sanitizing bedding and equipment. Regular fecal egg counts can also help identify horses with high pinworm burdens and guide targeted deworming efforts.
For horses that are particularly itchy or have developed a tail that looks like a bristle brush due to rubbing their hind end on fences or trees, the application of a soothing lotion or cream may provide some relief. It is important to address these symptoms promptly to prevent secondary skin infections and other complications.