Pfizer is giving away a free equine weigh tape with every purchase of Equest & Equest Pramox (while stocks last), to help encourage accurate treatment against encysted small redworms this season.

According to the company, Equest & Equest Pramox are the only wormers in the UK that treat encysted small redworm in a single dose. Using a weigh tape to work out their horse's weight will help your clients avoid under dosing, which increases the risk of resistance development.

Pfizer says small redworms are the most common worms found in horses today. They can pose a very serious health risk to horses and it's important for owners to make sure that they are treated properly during the autumn or early winter.

Small redworms can grow up to 2.5cm in length and are thin and reddish in colour. Small redworm eggs are passed in the faeces and then hatch on pasture and continue to develop into more advanced larval stages before being ingested by the horse as it grazes. The larvae burrow deeply into the wall of the gut where they encyst and may account for up to 90% of the redworm burden in the horse¹. Encysted small redworm will not show up in a Faecal Worm Egg Count - even if the horse has shown a negative or low count it could still be harbouring several million encysted small redworms².

Encysted small redworms can remain dormant inside a horse for up to two years, but they usually 'wake-up' in late winter or early spring, developing and emerging from the gut wall all at the same time. In severe infestations mass emergence can lead to a disease syndrome known as 'larval cyathostominosis', causing diarrhoea and colic with up to a 50% mortality rate³. Young horses of less than six years of age can often be at higher risk of the disease³ but small redworm can cause life-threatening illness at any time of year and in any age of horse.

Ben Gaskell, Pfizer's veterinary adviser said: "Treating encysted small redworms successfully in the late autumn or early winter is important to avoid the risk of larval cyathostominosis. It's important to advise your customers to choose a product that is licensed to treat the worms they are targeting and that they give the correct dose, by weighing their horse beforehand, as this will help preserve the efficacy of the drug used."

Pfizer's Does your wormer measure up campaign is backed with point of sale materials and a media campaign. To receive a free weigh tape, valued at £7 your clients need to buy a tube of Equest or Equest Pramox, fill in an application form and send Pfizer the batch and expiry flap from the pack. Pfizer will then send them a FREE Weigh Tape while stocks last.

For further information contact your Pfizer Account Manager.

References

1. Bairden K. et al (2001) Veterinary Record 148, 138-141
2. Dowdall S.M.J. et al (2002) Veterinary Parasitology 106, 225‑242
3. McWilliam H. et al (2010) International Journal for Parasitology 40, 265-275

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