Strangles Understanding, Prevention, And Recent Outbreaks In Wisconsin

Strangles in Horses: A Persistent Threat

A recent case in Wisconsin involving a 15-year-old Quarter Horse mare has underscored the enduring risk of strangles, a highly contagious equine disease. The mare tested positive on March 23 after showing symptoms, such as nasal discharge, and is currently under quarantine. This incident is a reminder of how vigilance and informed practices can help mitigate the spread of equine diseases.

Understanding Strangles: Cause and Transmission

Strangles is caused by the bacterium Streptococcus equi subspecies equi. It spreads through direct horse-to-horse contact, or indirectly via contaminated objects like shared tack, buckets, or grooming tools. Even horses not showing symptoms can carry and transmit the bacteria, posing a significant challenge in managing outbreaks. Recovered horses may remain contagious for at least six weeks, increasing the risk of prolonged disease presence in equine populations.

Clinical Signs and Diagnosis

Recognizing the clinical signs of strangles is crucial for early intervention. These include:

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

Veterinarians typically diagnose strangles via polymerase chain reaction (PCR) testing, which is used to analyze nasal swabs, washes, or samples from an abscess. This testing method allows for rapid and accurate identification of the bacterium.

Treatment and Vaccine Limitations

Although most horses recover fully within three to four weeks with supportive care, severe cases may require antibiotics. However, excessive use of antibiotics can hinder the horse’s natural immune development. While there is a vaccine available, its effectiveness is variable, making it an unreliable standalone preventive measure. Thus, vaccination should be coupled with other control strategies.

The Crucial Role of Biosecurity in Prevention

Implementing strict biosecurity measures is vital in preventing the spread of strangles. Key steps include:

Quarantining new arrivals for a minimum of three weeks
Maintaining rigorous hygiene, including regular disinfection of equipment and facilities
Limiting horse-to-horse contact, especially in environments where multiple horses are present

The Equine Disease Communication Center (EDCC), through programs like EDCC Health Watch, provides critical support by disseminating disease alerts, enabling horse owners to remain updated on potential outbreaks and safeguard their herds effectively.

Strangles Outbreaks in Wisconsin: A Closer Look

The recent case in Jefferson County is not isolated. Wisconsin has witnessed a pattern of strangles infections, with cases reported in Marinette and Brown Counties in previous months. Notably, on February 6, a 12-year-old Miniature Horse mare tested positive in Marinette County after arriving from a kill pen, raising concerns due to the exposure of 12 other horses. Similarly, a 17-year-old Thoroughbred mare in Brown County was diagnosed with strangles on August 17. These cases highlight the importance of consistent monitoring and prompt action to control outbreaks.

National Context: Strangles Beyond Wisconsin

Strangles is not limited to Wisconsin; outbreaks have occurred nationwide, including recent incidents in Oregon and Florida. The national spread of the disease underscores the need for vigilance and adherence to best practices by equine professionals and horse owners. By subscribing to alerts from organizations like the EDCC, stakeholders can stay informed and proactively protect their horses.

Conclusion: Proactivity and Preparedness

Strangles poses a perennial threat to equine health, necessitating a proactive approach centered around biosecurity, early diagnosis, and strategic vaccination. While it remains a challenge, informed and prepared horse owners can minimize the risks associated with this disease. By staying updated through resources like the EDCC, the equine community can work collectively to safeguard herd health and prevent the spread of infections. For further details, please refer to the original article: [The Horse](https://thehorse.com) and [EquiManagement](https://equimanagement.com/news/edcc-health-watch/wisconsin-mare-tests-positive-for-strangles-3/).

Strangles Understanding, Prevention, And Recent Outbreaks In Wisconsin And Beyond