Jun 16, 2023 · Equine pinworms, or Oxyuris equi, are common parasites that inhabit the horse’s colon. Female pinworms lay their eggs on the perianal skin (around the anus), which can cause intense itching and irritation for the horse.

Pinworms (Oxyuris equi) are one of the primarily causes of tail rubbing in horses. Through rubbing, horses spread the eggs of the pinworm throughout their environment, which are able to live for a significant period of time since they are quite hardy.

Diagnosis is confirmed by recovery of Oxyuris eggs in samples collected from around the anus of a suspected host. Typical Oxyuris eggs are oval, flattened on one side, have a single operculum, and contain a coiled larva ( Fig. 57-10 ).

Pinworms in horses are caused by a parasite called Oxyuris equi. The lifecycle of ms in horses is a little different to other intestinal worms. It’s important to understand the lifecycle so that appropriate equine pinworm treatment can be given.

The eggs of T axei are morphologically indistinguishable from strongylid eggs of horses and ruminants. Diagnosis of T axei infection can be based on the presence of third-stage larvae, as identified in coproculture.

The large mature adult females of O. equi, and sometimes typical eggs, may be seen in the feces (the latter by fecal flotation). More usually, eggs are detected in swabs or scrapings from the anus or peri-anal skin.

Apr 18, 1990 · This activity causes infected eggs or releases L 3 to be directly ingested by the host or once the egg mass is dried out, it can be dislodged, falling to the ground or in feed or water, thus contaminating the environment where other horses ingest the infective eggs. Eggs can survive for 8–10 weeks.

Jun 7, 2022 · Oxyuris equi has a direct life cycle. Female worms in the large intestine move towards the rectum. Their posterior end crawls outside the anus where they lay eggs around the perianal region. These eggs are surrounded by a sticky fluid of a …

Mature worms living in the horse’s gastrointestinal tract crawl out of the rectum and lay eggs on the skin around the horse’s tail. Eggs enter the environment in feces or tail rubbing. Eggs develop into larvae, which are consumed when the horse grazes.

Egg develops to infective L3 larvae in 4-5 days, this is ingested, passes into the intestine and develops via L4 larvae to adult in 4-5 months. Epidemiology. Lifecycle involves development of adult in large and small colon. Females migrate to anus and lay eggs on perineum.