Horse allergy
Streaming eyes after an hour at the stables, or just from hugging someone who rides? Horse dander is a strong allergen that travels well on clothes. Our test checks IgE sensitisation to three horse proteins, alongside the grass pollen, moulds and mites that share the stable with it, as part of 300 allergens and allergen components from one sample.
- Group
- Animals
- Also known as
- horse allergy, horse dander, Equ c 1, equine allergy, riding allergy
Where you meet it
- Stables, riding schools and paddocks
- Riding clothes, boots, saddles and grooming kit
- Cars and homes of people who ride
- Some older furniture and mattresses stuffed with horsehair
What horse allergen is
Horses shed proteins in their dander, hair, saliva and sweat. The main one is called Equ c 1. Like cat allergen, it sticks to fabric and is carried well away from the animal.
Because of that, people who never go near a horse can still meet the allergen through a partner, child or colleague who rides.
What people commonly report
Reports include sneezing, a runny or blocked nose and itchy eyes during or after stable visits, sometimes with hives where skin touched the horse. People with asthma may notice their chest tightening.
Stables are crowded with possible triggers: hay and straw carry grass pollen and mould spores, and dust mites live in bedding. A result for horse alone does not tell you which one is behind your symptoms, which is why seeing them side by side helps.
- Sneezing and itchy eyes at the stables
- Hives on arms or face after grooming
- Symptoms from a rider's clothes at home
Horse, cat and dog
Some proteins in animal dander, such as serum albumins, are similar across species. A minority of people sensitised to horse also show IgE to cat or dog because of this. It is a lab pattern worth knowing, not proof that every animal will cause symptoms.
How the test checks horse
Your finger-prick sample is tested for IgE to 300 allergens and allergen components. That includes three horse proteins alongside grass pollen, moulds, house dust mites and storage mites, so the main stable allergens can be seen side by side.
A positive result means sensitisation, not a diagnosis. Each value gets a class from Negative to Very high, for you to discuss with a doctor.
- Equ c 1: the main horse allergen (a lipocalin)
- Equ c 3: horse serum albumin, similar to albumins in cat and dog
- Equ c 4: a protein from horse sweat and saliva (latherin)
Known cross-reactions
- Cat and dog
- Similar serum albumin proteins can make results for horse, cat and dog rise together in some people.
Sources
- Animal allergens and their presence in the environment. Frontiers in Immunology, 2014.
- EAACI Molecular Allergology User's Guide 2.0. Pediatric Allergy and Immunology (EAACI), 2023.
Page last updated
300 allergens. One test.
A finger-prick sample at home, sent by post. A detailed lab report typically 5 days after the lab receives your sample, and our plain-English guide to reading it. €300, €1 per allergen.
Questions
Can I react to horses without touching one?
Yes. Horse allergen sticks to clothes, boots and kit, so people often meet it through someone who rides. The test shows whether you are sensitised, regardless of how you were exposed.
Is it the horse, the hay or the dust?
Stables contain horse dander, grass pollen in hay, mould spores and dust mites. The panel includes all of them, storage mites from hay too, so you can see which ones your blood shows IgE to. A doctor helps link that to your symptoms.
I ride every week. Should I stop if my result is positive?
Do not make that decision from a test result alone. Sensitisation is not the same as a clinical allergy. Talk to a doctor, especially if you notice chest symptoms around horses.