The Florida Department of Agriculture and Consumer Services (FDACS) has confirmed one case of strangles and identified five suspected cases at an equine boarding facility located in Brevard County, Florida. This cluster has led to the immediate imposition of an official quarantine on the premises, affecting a total of 69 horses that have been identified as exposed to the highly contagious bacterial infection. This recent incident marks the 25th confirmed strangles case reported in Florida for the year 2026, underscoring the persistent challenge this disease poses to the state’s vibrant equine industry. The swift action by FDACS aims to contain the outbreak and prevent further dissemination of the pathogen within the broader equine community.

Chronology and Initial Response

The sequence of events leading to the current quarantine began with the identification of a horse exhibiting clinical signs consistent with strangles at the Brevard County facility. Following initial veterinary examination, samples were collected and submitted for diagnostic testing. The subsequent polymerase chain reaction (PCR) test results returned positive for Streptococcus equi subspecies equi, the bacterium responsible for strangles, confirming the index case. This confirmation immediately triggered the involvement of FDACS, which initiated an epidemiological investigation. During this investigation, five additional horses on the property displayed similar clinical symptoms, leading to their classification as suspected cases. Furthermore, contact tracing revealed that 69 horses had been in direct or indirect contact with the infected or suspected animals, necessitating their inclusion under the official quarantine protocol. The quarantine, mandated by FDACS, restricts the movement of all equids on and off the affected property, prohibits the entry of new horses, and requires stringent biosecurity measures to be implemented to mitigate the risk of spread.

Understanding Strangles: A Persistent Equine Threat

Strangles is one of the most commonly diagnosed and economically significant infectious diseases affecting equids worldwide. Caused by the bacterium Streptococcus equi subspecies equi, it is characterized by abscess formation in the lymph nodes of the head and neck, often leading to a characteristic "strangling" effect as these swollen nodes compress the upper airway. The disease is highly contagious and spreads primarily through direct contact between horses, but also readily via indirect contact with contaminated surfaces, equipment, water troughs, feed buckets, tack, clothing, and even human handlers who have been in contact with infected animals.

The insidious nature of strangles lies in its ability to spread even before clinical signs are apparent and for a prolonged period after apparent recovery. Horses that appear healthy can harbor and shed the bacteria, acting as silent carriers. Moreover, horses that have recovered from an acute infection can remain contagious for at least six weeks, and in some cases, for months or even years, particularly if they develop guttural pouch empyema—a condition where pus accumulates in the guttural pouches, anatomical diverticula of the auditory tubes, acting as a persistent reservoir for the bacteria. These carrier animals are a primary source of new outbreaks, making eradication challenging.

Detailed Clinical Manifestations and Diagnosis

The clinical signs of strangles can vary in severity but typically include:

• Fever: Often the first sign, with temperatures rising to 103-106°F (39.4-41.1°C).
• Nasal Discharge: Initially clear and watery, progressing to thick, purulent (pus-like), and often copious, yellow or white discharge from both nostrils.
• Lymph Node Swelling: Painful enlargement of the submandibular (under the jaw) and retropharyngeal (behind the throat) lymph nodes. These swellings can be unilateral or bilateral.
• Abscess Formation: The swollen lymph nodes often mature into abscesses that eventually rupture, discharging thick, creamy, and highly infectious pus. This rupture typically occurs externally, but internal rupture into the guttural pouches or pharynx can also happen, increasing the risk of aspiration pneumonia or carrier state.
• Dysphagia: Difficulty or reluctance to swallow due to pain and swelling in the throat area.
• Anorexia and Depression: Loss of appetite and general lethargy are common due to fever and discomfort.
• Coughing: May be present, especially if there is irritation or discharge in the pharynx.
• Respiratory Distress: In severe cases, particularly if the retropharyngeal lymph nodes become excessively large, they can obstruct the airway, leading to labored breathing, inspiratory stridor (a harsh, high-pitched sound during inhalation), and even suffocation—hence the name "strangles."

Diagnosis relies on a combination of clinical signs and laboratory confirmation. Veterinarians typically use polymerase chain reaction (PCR) testing, which detects the bacterial DNA, from samples obtained via nasal swabs, nasal washes (lavage), or aspirates from abscesses. PCR is highly sensitive and can detect the bacteria even in horses showing subtle signs or in the early stages of infection. Bacterial culture can also be performed to confirm the presence of S. equi and for antibiotic sensitivity testing, though it is slower than PCR. Endoscopic examination of the guttural pouches and subsequent lavage are crucial for identifying carrier horses.

Treatment Strategies and Immunity

Treatment for strangles cases is multifaceted and typically guided by the horse’s clinical presentation. In many uncomplicated cases, supportive care is paramount. This includes providing a warm, dry, and dust-free environment, easily digestible feed, plenty of fresh water, and analgesics/anti-inflammatories to manage pain and fever. Warm compresses applied to swollen lymph nodes can encourage abscess maturation and rupture. Once abscesses rupture, the area should be kept clean and flushed to facilitate drainage.

The use of antibiotics in strangles cases is a nuanced decision. While antibiotics like penicillin are highly effective against S. equi, their indiscriminate use can sometimes be counterproductive. Treating early-stage cases with antibiotics before abscesses have formed can prevent the horse from developing a robust natural immunity to the disease. Therefore, many veterinarians reserve antibiotic therapy for severe cases, such as those with significant respiratory compromise, rapidly spreading cellulitis, or metastatic strangles (bastard strangles), where the infection spreads to other parts of the body, causing internal abscesses in organs like the lungs, liver, or brain. Overuse of antibiotics in mild cases can prolong the shedding period and potentially contribute to antibiotic resistance. Most horses with uncomplicated strangles make a full recovery within three to four weeks with appropriate supportive care.

Florida’s Equine Health Landscape and Broader Implications

Florida holds a prominent position in the United States’ equine industry, boasting a significant population of horses involved in various disciplines, including thoroughbred racing, sport horse breeding, Western riding, and pleasure riding. This dense equine population, coupled with frequent horse movement for competitions, sales, and breeding, creates an environment where infectious diseases like strangles can spread rapidly if not managed effectively. The identification of 25 confirmed cases by the first quarter of 2026 indicates an ongoing and significant disease burden, highlighting the need for continuous vigilance and robust disease surveillance programs. While specific annual averages for strangles can fluctuate, this number underscores that the disease remains a persistent challenge, demanding proactive measures from both state authorities and individual horse owners.

The economic ramifications of strangles outbreaks are substantial. For boarding facilities, an official quarantine can mean a complete halt to operations, including lessons, training, and boarding income, for several weeks or even months. Horse owners face significant veterinary bills for diagnosis, treatment, and ongoing monitoring. The disruption to training schedules, inability to attend competitions, and potential depreciation in value for affected horses add further financial strain. Beyond the immediate costs, the psychological toll on owners and barn managers dealing with a highly contagious and potentially life-threatening disease is considerable.

Official Responses and Communication Networks

The Florida Department of Agriculture and Consumer Services plays a critical role in safeguarding animal health within the state. Upon confirmation of an infectious disease like strangles, FDACS enacts established protocols for investigation, containment, and communication. The official quarantine imposed on the Brevard County facility is a standard measure designed to prevent the disease from spreading beyond the immediate premises. During a quarantine, FDACS veterinarians and animal health officials provide guidance on biosecurity, testing protocols, and cleaning/disinfection procedures. They also monitor the health status of all horses within the quarantined zone until the disease is deemed cleared.

Crucial to effective disease management is timely and accurate communication. The EDCC Health Watch program, an initiative of the Equine Network, plays a vital role in disseminating verified equine disease reports. Utilizing information directly from the Equine Disease Communication Center (EDCC), an independent nonprofit organization supported by industry donations, EDCC Health Watch provides open access to infectious disease information. This centralized communication hub is essential for veterinarians, horse owners, and industry stakeholders to stay informed about outbreaks, understand risks, and implement appropriate preventative measures, thereby minimizing panic and ensuring a coordinated response.

Prevention and Biosecurity: The Cornerstones of Control

Given the highly contagious nature of strangles and the challenges associated with its eradication, prevention through stringent biosecurity measures is the most effective strategy. Key preventative practices include:

• Quarantine for New Arrivals: All new horses introduced to a facility should undergo a minimum 21-day quarantine period, ideally 30 days, in a separate area with dedicated equipment and personnel. During this time, they should be monitored for signs of illness and potentially tested for S. equi to identify asymptomatic carriers, particularly through guttural pouch endoscopy and PCR.
• Isolation of Sick Horses: Any horse showing signs of illness, especially fever or nasal discharge, must be immediately isolated from the general herd. Dedicated equipment, separate handlers, and strict hygiene protocols are essential for the isolation area.
• Strict Hygiene and Disinfection:
  • Thorough cleaning and disinfection of stalls, equipment (feed buckets, water troughs, tack), and transport vehicles (trailers) that have been in contact with infected horses.
  • Use of effective disinfectants such as bleach, accelerated hydrogen peroxide, or quaternary ammonium compounds, following manufacturer’s instructions.
  • Regular cleaning of shared areas and communal water sources.
• Personal Protective Equipment (PPE): Handlers working with sick or quarantined horses should wear disposable gloves, protective outer garments, and dedicated footwear, changing or disinfecting these items before handling healthy horses. Handwashing with soap and water or alcohol-based sanitizers is critical.
• Strategic Pasture Management: Avoid overcrowding pastures. Consider rotating pastures to allow natural decontamination.
• Vaccination: A strangles vaccine is available in both intramuscular and intranasal forms. While not 100% effective in preventing infection, vaccination can reduce the severity of clinical signs and potentially the duration of shedding. It is often recommended for horses at high risk of exposure, such as those that frequently travel or are housed in large boarding facilities. Horse owners should discuss the suitability of vaccination with their veterinarian, considering their horse’s individual risk factors and the prevalence of strangles in their area.

Broader Impact and Community Vigilance

The current strangles outbreak in Brevard County serves as a potent reminder of the fragility of equine health and the interconnectedness of the horse community. An outbreak at one facility can have ripple effects, impacting surrounding barns, local events, and the reputation of the region’s equine industry. The collective responsibility of horse owners, veterinarians, and regulatory bodies is paramount in controlling such diseases.

Prompt reporting of suspected cases to veterinarians and state animal health officials is crucial for early intervention. Adherence to biosecurity protocols, even when there are no known outbreaks, is the most effective defense. The 25th confirmed case in Florida for 2026 highlights that strangles is not a disease of the past but an ongoing, active threat that requires continuous education, vigilance, and collaborative action to protect equine welfare and the economic stability of the industry. As the equine community moves forward, the lessons learned from each outbreak reinforce the critical importance of preparedness and a unified approach to managing infectious diseases.