Lifecycles: Eggs
hatch when eaten by the horse. Larvae migrate to the stomach and mature.
Adult worms in the stomach and in the small intestine irritate and
erode the villi, or finger-like projections, of the gut, damaging the
capillaries and lymph vessels. Eggs are laid and passed in the manure.
How
It Gets Into Your Horse: Hairworm larvae are swallowed as your horse
eats infected grass.
Dangers If Left Untreated: When damaged, villi are
unable to digest and absorb nutrients properly. Dark, foul-smelling
diarrhea may result. Severe damage can cause bleeding into
the intestine, leading to anemia and loss of condition.
Foals are particularly susceptible to hair worm infection.
HAIR
WORM
Trichostrongylus
axei - adults
fenbendazole
ivermectin
moxidectin
oxfendazole
oxibendazole
pyrantel
pamoate
pyrantel
tartrate - daily
pyrantel
tartrate-single
Based
on registered label claims and FOI summaries for each product
on file with the FDA; single-dose application.
