
06/03/2025
Understanding Sweet Itch in Horses and the Role of Vaccination 🐴💉
Sweet itch, also known as insect bite hypersensitivity, is a common allergic reaction in horses caused by bites from midges, particularly those of the Culicoides species. This condition leads to intense itching and discomfort, primarily affecting areas such as the mane, tail, and belly. Affected horses may exhibit persistent rubbing, hair loss, and inflamed or scabbed skin. Beyond physical symptoms, sweet itch can significantly impact a horse’s overall well-being and behaviour.
Innovative Vaccination Approach 💉
In recent years, a vaccine originally developed to combat ringworm has shown promise in reducing the symptoms of sweet itch. This vaccine is used off-license in the UK for this purpose. The vaccination protocol involves administering two intramuscular injections, approximately two weeks apart, ideally before the start of the midge season. For ongoing protection, the vaccine can be repeated every nine months or restarted annually before the midge season. 
Comprehensive Management Strategies 🛡️
To effectively manage and prevent sweet itch, consider implementing the following strategies:
• Insect Control: Regular application of insect repellents, use of fly sheets or sweet itch-specific rugs, and stabling during peak midge activity periods (dusk to dawn) can help reduce exposure.
• Environmental Management: Keeping horses in open, breezy fields can deter midges, as they are weak fliers. Avoiding pastures near woodlands or standing water, which are common midge breeding grounds, is also beneficial. Regular cleaning of water troughs can prevent midge larvae development.
• Stable Modifications: Installing insect-proof mesh on stable windows and doors, and using fans to create air movement, can discourage midges from entering stables.
• Nutritional Support: There is some evidence that feed supplements designed to support skin health, such as Cavelesse and Brewer’s Yeast, may help alleviate symptoms.
Take Action Now! 📅
As the midge season approaches, it’s crucial to implement preventive measures early. If you’re considering the vaccination for your horse, please get in touch with us to discuss the best approach and schedule an appointment. Together, we can ensure your horse enjoys a comfortable and itch-free season.