Dedicated to effective

parasite control


With the advent of widespread worm resistance to the commonly used dewormers, the term BROAD SPECTRUM DEWORMER is now a myth.  We are in real danger of landing up with worms that are multi drug resistant.  Just as medical doctors are concerned about antibiotic resistance bringing back old long forgotten diseases into our midst, so too we as horse owners need to be concerned about parasites that are flourishing in spite of our efforts at eradicating them. 


The minute brain of the parasite is beginning to outsmart the shrewdest horse owner and his veterinarian! 


Our team at Worm-Ex Lab will put you, your horses and your regular vet in an informed position to manage the increasing complexity of equine parasites better and cheaper than regular across the board deworming. 


It really does pay to count your eggs before they hatch!

About us

The Worm-Ex Lab exists to assist the owner and their regular veterinarian to cost effectively implement modern evidence based preventative veterinary medical guidelines to enhance equine (and livestock and wildlife) health.


The Lab was founded on the passion and wide experience of Dr Karl van Laeren and his veterinary practice partner, Dr Jane Howes, and the widely recognized Danish veterinary deworming system.

Latest News 

Ascarids being shed in 16 year old mare after treatment

Ascarids are a parasite normally found in young horses of up to 18 months old - they can be deadly if not identified and treated timeously. They have also been found to be resistant to most dewormers.

However, Worm-Ex Lab received a sample from a 16 year old mare which, in spite of being dewormed every two months, and being in great condition, still passed worms in her manure.

The sample was tested, and found to have a heavy burden of ascarids - apparently she has been like this all her life. We provided the appropriate treatment, and this is a pic of the ascarids being passed in her manure the day after treatment!

This is an excellent example of why it is so important to test before you deworm.

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