Long flat worms.
Live in intestines at junction between small and large intestine.
Cause irritation to gut wall.
Can cause colic.
Eggs passed intermittently in intestines - Not reliably detected in Worm egg counts.
Blood test available to measure level of infection.
Treated with specific class of wormers.
• White worms with long thin tails.
• Live in rectum.
• Females lay eggs around anus and live just inside anus.
• Females and eggs cause irritation around anus and tail.
• Eggs spread by horses eating eggs that are rubbed onto fences and mutual grooming
.Worm Egg Counts
These are tests done on small sample of fresh faeces the faeces are diluted to a specific concentration and examined under a microscope the worm eggs are identified by their shape and colour and a count made. The results are given as a number of eggs per gram.
These results can then be used to decide whether to treat with an anthelmintic. In adult horses that are healthy we don’t treat horses with a count lower than 250 e.p.g but the threshold changes with age and health in horses. Your results will be reported by a vet or vet nurse who can advise you on what wormer to use if needed and give advice on future testing.
There are several types of wormer and they are effective against different species of worms. Selective use of wormers only in horses with significant numbers helps reduce the risk of resistance to anthelmintics. Tapeworms are treated with Pyrantel or Praziquantel such as Strongid-P, Pyratape- P and Equitape. Encysted cyathastomes are treated with 5-day course of fenbendazole (Panacur) or moxidectin (Equest). Treatment for red worms and Roundworms can also include Ivermectin based wormers such as Noromectin, Equavalan and Eraquell. Combination wormers are also available.