Strangles in Two Wisconsin Counties

Two horses in Wisconsin, who reside in Racine and Outagamie counties, tested positive for strangles and are recovering.
Map of Wisconsin highlighting Racine and Outagamie counties.
Two horses in Wisconsin, who reside in Racine and Outagamie counties, tested positive for strangles and are recovering. | Wikimedia Commons

Two horses in Wisconsin have tested positive for strangles. One horse is a 22-year-old Percheron gelding that resides at a boarding facility in Racine County. He was sampled for strangles on October 29 after showing respiratory signs and abscessing. The horse was placed under voluntary quarantine. Strangles was confirmed on November 2, and the horse is now recovering. Other horses in the barn also showed clinical signs and were seen by other veterinarians.

The second horse is a five-year-old Quarter Horse gelding at a training facility in Outagamie County. The horse showed respiratory signs and abscessing. He was sampled for strangles on October 27 and was confirmed positive through PCR. A follow-up nasal swab on November 14 was negative on PCR. No other horses showed clinical signs, and the gelding is now recovering.

EDCC Health Watch is an Equine Network marketing program that utilizes information from the Equine Disease Communication Center (EDCC) to create and disseminate verified equine disease reports. The EDCC is an independent nonprofit organization that is supported by industry donations in order to provide open access to infectious disease information.

About Strangles

Strangles in horses is an infection caused by Streptococcus equi subspecies equi and spread through direct contact with other equids or contaminated surfaces. Horses that aren’t showing clinical signs can harbor and spread the bacteria, and recovered horses remain contagious for at least six weeks, with the potential to cause outbreaks long-term.

Infected horses can exhibit a variety of clinical signs:

  • Fever
  • Swollen and/or abscessed lymph nodes
  • Nasal discharge
  • Coughing or wheezing
  • Muscle swelling
  • Difficulty swallowing

Veterinarians diagnose horses using polymerase chain reaction (PCR) testing with either a nasal swab, wash, or an abscess sample, and they treat most cases based on clinical signs, implementing antibiotics for severe cases. Overuse of antibiotics can prevent an infected horse from developing immunity. Most horses make a full recovery in three to four weeks.

A vaccine is available but not always effective. Biosecurity measures of quarantining new horses at a facility and maintaining high standards of hygiene and disinfecting surfaces can help lower the risk of outbreak or contain one when it occurs.

Brought to you by Boehringer Ingelheim, The Art of the Horse

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