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worms are less harmful than the parasites discussed previously.
They cause rectal irritations primarily.
How
your horse becomes infected:
Horses become infected by consuming feed and water contaminated
with infective worm eggs.
Health
effects: Immature worms can produce severe damage to the mucous
membrane in the upper large intestine. The details of the life cycle
of these worms are not completely known. It is known that the worm
lives in the lower intestine where they produce a moderate inflammation.
The females leave the rectum and deposit their eggs on the skin
around the anus, causing an intense itching which the horse attempts
to relieve by rubbing the tail.
