Horses are monogastric herbivores. This means they have a simple, single chambered stomach. Consequently, the tests we conduct on horses differ greatly from those of small and large ruminants. Info on our large ruminant tests can be found here, while our small ruminant tests are here.

Worm Egg Counts

Worm egg counts (WEC) are an accurate method of checking the worm status of a mob/group or individual animals. The test provides an indication of the type and size of worm burdens present. This allows the horse owners to choose whether a drench is required. Furthermore they can minimize the use of drenches when they are not required.

The test determines the number of eggs in a sample of faeces and is expressed as ‘eggs per gram’ (EPG) of faeces. For monogastric herbivores (horses) the significant worm species our worm egg counts are able to detect include:

  • strongyle (Large & Small)
  • ascarid (Parascaris equorum)
  • tapeworm (Anoplocephala perfoliata)

Individual Worm Egg Count (McMaster)

An individual WEC gives you 15 individual counts from each of the wells in our sample collection tray in the WEC test kit. Eggs per gram (EPG) are calculated for each of the 15 samples to show the highs, lows and distribution of eggs in a mob. This provides valuable information on existing (adult) worm burdens and paddock larval populations, if samples were collected just prior to drenching, or, for anthelmintic efficacy if faecal samples were collected 10-14 days post drenching.

Larval Differentiation

As eggs of the significant worm species appear very similar during worm egg counts, a larval culture will be required to identify individual species. This adds informative value to the test results as knowing which worm species are present can allow you to implement a strategic drench use plan.

Our price list can be found here.