What is Worm Control?

Effective worm control aims to prevent worms from completing their lifecycle and thus prevent further pasture contamination. Deworming programmes have evolved over the years and there are now a number of strategies that animal owners can use to help maintain their animals health and performance. Routine blanket use of deworming drugs is no longer recommended as this may encourage the development of drug resistance.

What exactly is Resistance?

Resistance is when a greater frequency of individuals in a parasite population, usually affected by a dose or concentration of compound, are no longer affected. Once resistance is present in a worm population, the health, welfare and performance of the animal infested with resistant worms will be compromised. For this reason it is essential that your animal is dosed accurately and accordingly.

Why Worm Test?

Parasite testing allows you to monitor livestock production by checking for clinical and sub-clinical diseases that may be hampering growth rates or production. Regular monitoring of livestock can reduce drenching frequency and delay the onset of resistance as you are not “blanket drenching’ your herd, but drenching only when worm egg counts reach a threshold level. The threshold or drench trigger levels vary throughout the year according to seasonal influences and stock type, age, condition and pasture availability. At WestLab, we objectively analyse the sample, and give free interpretation of the results obtained.


How to Collect a sample for Testing?

Dung samples for parasitological examination should be collected from the rectum of the animal, if rectal samples cannot be obtained, fresh faecal samples may be collected from the pasture (an ideal time to collect a sample from the pasture is when a group of animals rise after resting). We recommend samples to be dispatched as soon as possible to WestLab in a suitable container (We can provide containers on request), other suitable containers accepted are:

  • screw cap containers
  • plastic containers with lids
  • Zip-Seal plastic bag

Suitable Containers

Examples of Suitable Containers for samples (Samples must be labelled)

label Sample

It is imperative that each sample be clearly labelled with animal identification, date and place of collection.

Try filling the container to capacity or tightening the plastic bag as close to the faeces as possible. This is to exclude air from the container/zip plastic bag.

How is the Results of the Parasitology Test received by the animal owner and/or Veterinarian?

The results of your Worm Test are collated and formatted into a pdf document which can be sent to you via email. Alternatively, our senior Lab Analyst can call you to discuss your results if required. We keep results on file for up to 12 months so if you lose your results please call or email and we can send you out another copy.

How do I start testing?

WestLab collecting kits can be picked up from our Laboratory (by arrangement) in Charlestown or can be sent out to you by post on request. Please email us on info@westlab.ie and we will send you some kits.



Co. Mayo

Ph: 0879815658
Email: info@westlab.ie