Worm egg counts how they help you with anthelmintic treatment of your livestock

Worm Egg Counts

What is a worm egg count?

When we carry out a worm egg count (WEC) we examine a small sample of faeces (manure, dung) in our laboratory and count how many worm eggs are in it. The total is expressed as eggs per gram (EPG) and is indicator of the number of adult worms in the gut of your animal.

How WECs help you

A WEC has several uses:

  • It helps you find out whether you need to treat your animal with an anthelmintic
  • It gives you information on the level of parasite contamination in your sheds or on your pasture
  • It helps researchers measure the effectiveness of an anthelmintic treatment

Our WEC services

To carry out a WEC we’ll need a sample of your animal’s faeces:

TEST MINIMUM g FAECES WE NEED
WEC 10g
WEC reduction test 10g for each test
Pinworm Please get in touch so we can send you the kit
Liver fluke 20g
Tapeworm 50g
Lungworm 20g

When you request a WEC we’ll send you a test kit. The kit includes a guide to help you interpret the results. As soon as we’ve completed the test we’ll get in touch and let you know what the EPG count is.

This will help you decide whether worming is necessary, when you need to carry out another WEC and whether you need any other control methods.

We can test the faeces of agricultural livestock, poultry and game birds. Please call us if your animal isn’t shown here as we may still be able to help.

WECs as part of your overall worming strategy

While a WEC is undoubtedly valuable, it should not be your only tool for deciding how best to treat parasites in your animals.

You can see more information on the limits of WECs at www.cattleparasites.org.uk.

For more information on the use of anthelmintics, please see our Anthelmintic Resistance page.