Lee County, FL, Confirms Case of Strangles

The case was confirmed in one horse on June 30, 2022.
The case is located in Lee County, FL, identified in red on the map of the state. 

A 6-year-old Thoroughbred gelding used for pleasure riding tested positive for strangles on June 30 after presenting with mucopurulent (containing mucus and pus) nasal discharge, fever, and lethargy and appearing underweight on June 24. Fifteen horses at the boarding facility in Lee County, Florida, were exposed, and the premises is now under official quarantine.

This is the 36th strangles case reported by the Florida Department Agriculture and Consumer Services in 2022.

To read the alert and others, click here.

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.

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