How to Protect Your Horse During an Infectious Disease Outbreak

Your step-by-step biosecurity checklist from veterinarian Dr. Barb Crabbe.

When an infectious equine disease pops up in your region, do you know exactly how to keep your horses safe?
Or what to do immediately if your horse becomes exposed?

To cut through the panic and misinformation, we asked H&R contributing veterinarian Dr. Barb Crabbe for a clear, actionable outbreak-response plan owners can follow the moment an alert hits.

1. Get Accurate Information

Before reacting, get facts from trusted veterinary sources, not social media chatter:

  • Your veterinarian
  • Local/state veterinary teaching hospitals
  • State Department of Agriculture or federal USDA updates
  • EDCC Health Watch

These outlets will confirm the disease involved, current risks, and recommended protocols for your area.

2. Avoid Exposure

You don’t need to lock your horse down unless your vet says so—but you should take smart precautions:

  • Avoid hauling to any barn, event, or show where cases are confirmed.
  • Ask your vet about immediate vaccination boosters if applicable (some diseases have no vaccine).
  • Limit visitors or outside horses entering your property during active outbreaks.

3. If Your Horse Was Exposed: Isolate Immediately

Exposure doesn’t equal illness—but it does require action.

  • Isolate for 14 days minimum (30 days is ideal).
  • Stall or pen should be at least 30–40 feet from other horses.
  • Check temperature daily; anything over 101.5°F requires a vet call.

Early detection reduces spread and can drastically improve treatment outcomes.

4. If Your Horse Becomes Sick: Contain the Contagion

Create a clear, safe quarantine system:

Protective gear checklist:
Rubber boots, gloves, dedicated fork/wheelbarrow, coveralls, hand soap, and sanitizer.

Set up a disinfectant footbath at the exit to prevent the disease from tracking through your barn.5. Strengthen Your Everyday Biosecurity Program

Strong biosecurity minimizes your risk—even outside outbreaks.

At Home

  • Keep vaccinations current for all horses on the property.
  • Quarantine new arrivals for 14–30 days.
  • Never share feed/water buckets or equipment.
  • Keep hoses from touching buckets when filling.
  • Dump manure and waste far from barns.
  • Reduce exposure to flies, mosquitoes, and wildlife that can spread disease.

On the Road

  • Don’t haul a horse with a fever or one who recently had one.
  • Disinfect stalls at shows before moving your horse in.
  • Avoid community water sources.
  • Don’t borrow halters, lead ropes, lip chains, or grooming tools.

6. How to Disinfect Properly (Most People Get This Wrong)

Effective disinfection is a multi-step process:

  1. Remove dirt and debris first—even disinfectant won’t work on top of organic matter.
  2. Wash with dish soap or laundry detergent.
  3. Apply a veterinarian-approved disinfectant:
    • Phenolic-based (Lysol)
    • Quaternary ammonium (Roccal-D)
  4. Rinse well.

Bleach can work, but it becomes ineffective when organic material (dust, manure) is present—making it unreliable in barn environments.

Items you can disinfect: grooming tools, bits, nylon halters, buckets, pitchforks, stalls, floors, tires, and shoes.

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