Postal Equine Worm Egg Count by P. L. B.

What is a worm count?

Although commonly known as a 'worm count' the test is actually a "faecal egg count". This is where a sample of the horses faeces (dung) is collected and then tested to determine the amount of worm eggs present and these are recorded as EPG (eggs per gram). If worm eggs are present it shows they have been laid by adult worms as part of their normal life cycle.

The results

A count of less than 200 epg is recorded as <200 epg and is classed as a low count. 200 epg - 1200 epg is recorded as >200 epg or <1200 epg depending on the exact number of eggs present and is classed as a medium count. Anything above this level is classed as a high count.

What do I do once I have the results?

Of course it is not possible to know your horses worm burden without getting a worm count done, but once you have the results you then have knowledge of your horses internal health and are in a better position to determine your worming strategy.

Many owners, in conjunction with their vet, are adopting a strategy which aims to reduce the quantity of chemicals given to their horse. In these cases, regular worm counts are done and worming chemicals are only given once the count reaches a certain threshold. This not only reduces the cost of worming, the amount of chemicals being given, but also considered to be helpful against the growing problem of resistant worms developing. Where possible, discuss your worming strategy with your vet.