Tag Archives: horse worming

Plea for horse owners to worm wisely

Ref: Horse & Hound; 12 March 2015 Horse & Hound

“Routine testing, not routine worming” is the message industry experts are trying to put across after a recent study found that 81% of owners are not conducting frequent faecal egg counts (FECs).

Nearly 1,000 owners were questioned on their current worming procedure and knowledge by equestrian supplier Countrywide. The results showed worrying trends.

“The survey has brought out the disparities in current practice against best practice and how this is leading to the rise in resistance to wormers,” said Countrywide’s Sara Blackshaw.

Only 31% of owners said they conduct regular FEC tests while nearly 60% of owners said that they routinely worm — interval dosing at set times of the year.

In 2010 the British Veterinary Association (BVA) launched a campaign telling owners that, in order to slow resistance, all worming treatments should be based on veterinary diagnosis.

The owner of Westgate Laboratories, Gillian Booth, is concerned the results show that owners have still not updated “their worming practice to match the increase in resistance and improvement in testing technology”.

“Previous worming practices have led to the resistance problems we now have, so it is vital that there is change,” she said.

Countrywide’s Mark Hawkins added: “Without testing there is no way of knowing if a wormer is being effective. The implications of not worming if it is required, or ineffective worming, can be severe.”

Lack of knowledge

The research also found that a worrying number of owners do not know the accurate weight of the horse they are worming — nearly 40% of people questioned were unclear.

Director of BW Equine Vets, Chris Shepherd, said this figure was “very concerning” as “dosing plays a large role in the increase in resistance”.

“If you do need to treat, accurate dosing is essential. Under-dosing promotes resistance and is similar to giving the worms a vaccine allowing resistance to build up to that particular wormer,”
Mr Shepherd added.

Industry experts want owners to take an active role in preserving wormers that are currently effective.

European veterinary advisor at Norbrook Pharmaceuticals, Rebekah Dudek, warned: “If we continue to worm simply ‘as we always have’, there is a chance we will eventually be left with no efficacious wormers in our arsenal, meaning we would have to rely on management strategies as the only option to control worm burdens.”

Horse Worming Regime at SimplyHorses Equine Vets

Here is an example of the ideal targeted worming regime we recommend at the clinic.

Note this is not suitable unless the yard (livery or private)  has a strict management and pasture control regime in place.

For more details give us a ring at the clinic.

Targeted Strategic Worming Regime:

March:  Faecal Worm Egg Count (FWEC) taken from every horse, those with levels over 200 eggs per gram are wormed

June: Faecal Worm Egg Count taken from every horse, those with levels over 200 eggs per gram are wormed

September:  Faecal Worm Egg Count taken from every horse, those with levels over 200 eggs per gram are wormed

October:  (Optional often combined with worming  in November) Double Dose of STRONGID P or Double Dose of PYRATAPE P or EQUIMAX for tapeworms (levels not detected on FWEC)

November:  EQUEST or PANACUR 5 day guard or EQUEST PRAMOX (if EQUEST PRAMOX no need to worm for tapeworms in October), this worming is to eradicate small encysted redworms (hibernating red worms).   Good regime for less intensive situations but hard to implement successfully in busy yards with high numbers entering and leaving the yard and high numbers rotating through paddocks:

Paul Proctor MRCVS

Worming Your Horse: Do It Properly Ask Your Vet!

A recent Study shows no resistance to moxidectin – 04/06/2009

A European study to evaluate the efficacy of the key anthelmintic molecules in treating equine cyathostomins has confirmed that resistance is developing against all of them, with the exception of moxidectin.

The study focused specifically on the molecules fenbendazole, pyrantel, ivermectin and moxidectin.

Resistance to fenbendazole was highlighted as a particular issue with 80 per cent of the yards tested in the UK and Germany showing resistance. Resistance to pyrantel also proved to be increasingly prevalent while cases of ivermectin resistance were emerging.

A small redworm larva The Fort Dodge-sponsored study, the largest of its kind so far undertaken, took place during 2008 and was led by scientific teams from veterinary faculties in Italy and Germany. It was based on Faecal Egg Count Reduction Tests (FECRTs) of 1,704 horses at 102 yards in Italy, Germany and the UK. The calculation of FECR data was performed employing bootstrap analysis of group arithmetic means.

The study concluded that:

* The testing of fenbendazole in a total of 80 yards showed resistance present in more than 80 per cent of the UK and German yards and in 38 per cent of Italian yards;
* Pyrantel was tested in all 102 yards with resistance being found in 25 per cent of yards in all three countries;
* Resistance to ivermectin was significantly lower with resistance found in only one yard in Italy and two in the UK from a total of the 102 yards tested;
* No resistance to moxidectin was detected in any yard in any country;
* Multiple resistance to fenbendazole and pyrantel or ivermectin was identified in all three countries, with one yard in the UK found to have resistance to fenbendazole, pyrantel and ivermectin.