Let’s talk about something that doesn’t often get front and center attention in the horse world—but absolutely should: equine herpesvirus, commonly referred to as “horse shingles.”

It’s a subject that tends to circulate quietly in barn conversations and group messages, yet it’s important knowledge for every horse owner to have.

Similar to shingles in humans following periods of stress, “horse shingles” refers to disease caused by members of the equine herpesvirus (EHV) family.

Of the 9 recognized equine herpesviruses, EHV-1, EHV-3, and EHV-4 are the most clinically important. These viruses are highly adapted pathogens that can spread efficiently within equine populations.

EHV infections represent a significant veterinary and economic burden due to their global distribution, wide range of clinical manifestations, and potential to cause serious illness and, in some cases, death. This is a condition that warrants careful attention rather than dismissal.

Equine herpesvirus spreads through direct contact—like nose to nose interaction—as well as indirectly through shared buckets, tack, grooming tools, and other equipment used around a horse that is actively shedding the virus (most often through respiratory droplets).

Humans can also play an unintentional role in transmission. If you handle a horse that’s shedding the virus and then move on to another, it is possible to carry the virus on your hands, clothing, or gear. Yes—you can be part of the chain, which is exactly why good hygiene and clean equipment matter so much.

Outbreaks often start when a horse returns from an event and spreads the virus within his home farm.

That big A rated show you hauled to last weekend? It’s wonderful for your ribbon collection, but potentially less wonderful for your barn’s biosecurity.

The clinical picture varies widely, which is part of what makes this virus so challenging.

EHV-1 primarily causes:

• Upper respiratory disease (especially in foals)
• Abortion and stillbirth in mares
• Can lead to a neurological condition known as equine herpes myeloencephalopathy (EHM), which may be fatal

Symptoms typically develop 2 to 5 days after exposure, and infected horses can shed the virus for up to 14 days.

This incubation window is exactly why so many outbreaks catch people off guard—your horse looks perfectly fine at pickup and is quietly contagious the whole drive home.

We’d all love a quick fix, and the horse world is no exception. But the truth—delivered plainly—is that there is no cure for equine herpesvirus once infection occurs.

Prevention through routine vaccination and strong biosecurity remains e most effective tool.

Treatment varies depending on the severity of the disease. In mild respiratory cases, supportive care such as anti-inflammatories and fever control may be enough.

The goal is to keep the horse comfortable, hydrated, and eating. In more serious neurological cases, hospitalization and intensive care may be necessary.

The good news is that proactive management really does matter here.

Horses at higher risk—those who travel often, compete regularly, or live in busy boarding barns—are commonly vaccinated every 6 months.

Strong biosecurity also goes a long way. Keep separate grooming kits, quarantine new arrivals, and give horses a quiet period after returning from shows or clinics before they rejoin the herd.

These steps aren’t dramatic—it’s just smart, consistent horsemanship.

Horse shingles—equine herpesvirus in its various forms—is one of those realities of equestrian life that no amount of perfectly polished tack can make disappear.

It calls for the same qualities that define a strong rider: knowledge, preparedness, and the ability to act decisively when it matters most.

Talk to your veterinarian. Stay current on vaccinations. And the next time EHV comes up in barn conversation, you’ll be the most informed person in the aisle—which, in the end, is the quiet mark of excellent horsemanship.