Large redworms have almost been eliminated from our horses,
but are still
potentially very dangerous.
The infective stages of large redworms are eaten
during grazing. These larvae burrow in and out of the walls of the arteries
that supply blood to the gut of the horse.
The resulting damage can lead to colic and sometimes death.
The adult worms are 2.5cm long, and feed off the intestinal
lining. This can cause internal bleeding and anaemia.
They appear reddish in colour due to the blood they suck
from the intestine.
The life cycle is around 6 months.
Large redworms can affect horses of any age.
