Strangles

Strangles is a highly contagious bacterial disease of horses that spreads primarily through direct horse-to-horse contact and contaminated equipment, people and transport vehicles. Early recognition and prompt isolation are the most effective ways to limit spread.

Good biosecurity protects everyone

Most outbreaks can be contained through early detection, isolation and good biosecurity. One of the greatest challenges with Strangles is that some horses can continue to carry the bacteria after appearing clinically recovered, making appropriate veterinary testing important before returning horses to normal management.

NZTR encourages all participants to work closely with their veterinarian if they have any concerns about a horse's health and continue following good biosecurity practices:

  • Avoid sharing tack, grooming equipment, feed bins, or water sources between horses.
  • Clean and disinfect equipment such as halters, buckets, grooming tools and lead ropes regularly.
  • Thoroughly clean stables and yards, removing contaminated bedding, manure or nasal discharge.
  • Clean and disinfect horse floats, trucks and other transport vehicles between uses.
  • Monitor horses closely following travel or attendance at events where horses from multiple properties have mixed.
  • Isolate any horse showing signs of illness and seek veterinary advice promptly.

If you suspect a horse may have Strangles, contact your veterinarian immediately and avoid moving the horse until veterinary advice has been obtained.

Strangles Updates

NZTR Introduces New Strangles Requirements for Racing and Trialling
6 JULY 2026

NZTR has introduced additional health requirements for all horses accepted to race or trial as part of the industry's response to the current Strangles situation.

Strangles Update July - 2026
3 JULY 2026

NZTR and the NZTBA are continuing to closely monitor the current Strangles situation.

Strangles Awareness and Prevention
12 JUNE 2026

Now that winter is here, New Zealand Thoroughbred Racing and the New Zealand Thoroughbred Breeders' Association are encouraging all industry participants to remain vigilant for signs of Strangles and to maintain good biosecurity practices.

NZTR Directives & Declarations

NZTR Racing Event Biosecurity Guidelines
New Strangles Requirements for Racing and Trialling
Strangles Health Declaration