Large Redworm

Fortunately Large Redworms have almost been eliminated from our horses, but they are still potentially dangerous, reddish in colour with a life cycle of 6 months they can affect horses of any age. The infective stages of Large Redworms are eaten during grazing where the 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 with potentially fatal consequences. The adult worms are 2.5cm long, feeding off the intestinal lining causing internal bleeding and anaemia.