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If You Have an Itchy Horse, You Really Need to Read This Book on Neck Threadworms

June 11, 2026 by Jane @ THB Leave a Comment

Fact:  neck threadworms are now a problem in more countries than 50 years ago. Why 50 years? Because that’s when the bulk of the research into the parasite Onchocerca cervicalis was published.

And an awful lot has changed since then. Uppermost are the shifting weather patterns that have created more warm, wet conditions that the parasite loves – and this has happened in more countries.

It’s a problem your local vet may not be 100% aware of – and it’s not just me saying that. See the results of this UK survey conducted by the University of Liverpool in 2022, published in the Journal of Equine Veterinary Science, and then there’s this vet magazine article frm 2024.)

So if your horse has a seasonal itching problem that nobody can get to the bottom of, then there’s a possibility that neck threadworms might be involved.

Why you need to read this neck threadworms eBook

Almost by accident, an article I wrote in 2012 put neck threadworms on the international map. It was written for my local clients in the coastal zone of northern NSW, Australia, but when I shared a link on Facebook, it suddenly went viral.

The way it took off and the immediate feedback told me everything I needed to know about how horse owners were desperate for answers. Some had horses with their ears shredded from itching. Another had spent in the region of US $10K on veterinary investigations.

All when a couple of tubes of ivermectin or moxidectin could provide an answer that changes horses’ lives.

If you have an itchy horse, you’ll know just what a nightmare this condition can be. 

Your horse is rubbing themselves raw. You’re forever replacing ripped fly rugs. You buy any number of no-itch products that don’t work, or work and then seem to stop. Your vets bills rise, as you pay for test after test, with no answer in sight.

Be honest now. Does any of this sound familiar?

If it does, neck threadworms may be affecting your horse

Not every itchy horse has neck threadworms, but for those that do, this parasite (aka Onchocerca cervicalis) is a nightmare.

And yet, for the cost of a few tubes of dewormer, it can be quickly identified. You can then follow a worming protocol that brings the problem under control.

It takes dedication, but it can be done.

Find the critical information in this eBook: All You Need to Know About Neck Threadworms and your Itchy Horse.

 

Itching along the center line is a sign, but is not always present.

This neck threadworms eBook can be a life changer

That’s no exaggeration. Hundreds of horse owners can testify to the usefulness of the info in All You Need to Know About Neck Threadworms and your Itchy Horse.

I’ve received emails and messages from owners whose years’ long battle against the itch has finally been solved.

Owners whose  horses are now relaxed and free of torment.

Other owners have been able to stop the problem from the get-go, as with the help of this eBook, they’ve recognized why their horse has just started itching.

A solution to your horse’s problem with neck threadworms

In this succinct eBook, you’ll find everything you need to know:

  • What the parasite is
  • How it behaves
  • Why it’s such a problem for horses
  • How to manage neck threadworms
  • What you need to do, and when
  • Why not every itchy horse has neck threadworms
  • All your nagging questions answered…

 

And who am I?

My name is Dr Jane Clothier and I’ve been researching and writing about this parasite for nearly two decades. I have a PhD in an equine development subject, meaning you can rely on the information included as being validly researched and carefully interpreted.

_________

This eBook is available from thehorsesback store. The eBook can be read in Apple Books, Google play, and eReaders such as Calibre (free Calibre download).

_________

Photos that show the signs of neck threadworms

You  need to know what to look for, so I’ve included photos showing common presenations. Some are typical and match the ones that equine vets have learned about.

Others aren’t – and that’s important to know.

The lowdown on neck threadworms in 20 chapters

The book is organised to make it easy as possible to read up on this parasite. Here are the chapters:

1. Introduction
2. Quick Check: Treatment Protocols
3. The Strange Lifecycle of Neck Threadworms
4. Signs Your Horse May Have Neck Threadworms
5. Can We Test for Neck Threadworms?
6. Is it the Itch – or Neck Threadworms?
7. Can Neck Threadworms Lead to ‘The Itch’?
8. The Treatment Protocols
9. Intense Itching After Deworming
10. How Long Do We Continue Deworming?
11. Deworming for Neck Threadworms and Gastrointestinal Worms
12. Reducing the Ulcer Risk
13. Managing the Itching Response
14. An International Parasite
15. Can We Overcome This Problem?
16. Biting Midges Differ Worldwide
17. How Does the Parasite Move Within the Horse?
18. A Problem with Diagnosis
19. Where to Next with Neck Threadworms?
20. More Help

_________

This eBook is available from thehorsesback store. The eBook can be read in Apple Books, Google play, and eReaders such as Calibre (free Calibre download).

 

IMPORTANT!

Almost every month, I hear from someone who is unable to open the eBook. Here’s  what you need to do.

  1. You will receive downloads of the following files: .ePub .mobi, which you can read in an eReader app on your device or laptop
  2. So, please check your emails after purchase – the email will be from PAYHIP, the service provider I use to distribute the eBook. Check your Spam folder!
  3. On a laptop or PC, save the attached files to a folder.
  4. You’ll need an eReader on your laptop, mobile or tablet to read this book. This is an app, such as Calibre, Apple Books or Google Play – there are many others available, mostly free and easy to use.
  5. Just open your eReader and your downloaded eBook should be viewable  straightaway. On laptops, you may need to browse to your saved files.

If you really can’t cope with eReaders…

I’ve made the PDF available. The higher price reflects the fact that in doing so, I am losing control of my intellectual property.

Note: this information is not intended to replace veterinary advice. Your equine veterinarian should always be consulted prior to starting any treatment protocols.

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