Strangles in Donkeys: Symptoms, Quarantine and Treatment
- Strangles is a highly contagious bacterial infection caused by *Streptococcus equi* subspecies *equi*. It affects horses, donkeys, and mules and spreads through nose-to-nose contact, shared water, buckets, tack, and handlers' clothing or hands.
- Common signs include fever, thick nasal discharge, swollen or painful lymph nodes under the jaw or throatlatch, reduced appetite, and trouble swallowing. Some donkeys may look quieter than horses, so mild early signs can be missed.
- Quarantine matters. New arrivals should be isolated for about 14 to 21 days, and during an outbreak equids should be separated into sick, exposed, and clean groups with dedicated equipment and caretakers when possible.
- Testing usually involves PCR or culture from nasal, nasopharyngeal, abscess, or guttural pouch samples. Donkeys that recover can still shed bacteria for weeks, and some become silent carriers in the guttural pouches.
- Treatment depends on severity and stage of disease. Options may include rest, soft feed, hydration support, anti-inflammatory medication, abscess care, and in selected cases antibiotics directed by your vet.
What Is Strangles in Donkeys?
Strangles is a contagious bacterial disease of equids caused by Streptococcus equi subspecies equi. It is best known in horses, but the same organism can infect donkeys and mules too. The infection targets the upper airway and nearby lymph nodes, especially under the jaw and around the throat, where painful swelling and abscesses can develop.
In many donkeys, the illness starts with fever and then progresses to nasal discharge, swollen lymph nodes, and discomfort when eating or swallowing. Some cases stay fairly localized and improve with supportive care. Others become more serious, especially if swelling affects breathing, if the infection spreads internally, or if the donkey becomes a long-term carrier.
One challenge for pet parents is that donkeys may not show illness as dramatically as horses. A donkey with strangles may seem dull, eat less, or stand quietly before obvious swelling appears. That is one reason early temperature checks and prompt veterinary guidance are so important when any equid on the property develops a fever or nasal discharge.
Symptoms of Strangles in Donkeys
- Fever, often 102-106 F
- Thick nasal discharge
- Swollen lymph nodes under the jaw or throatlatch
- Reduced appetite or trouble chewing and swallowing
- Depression, quiet behavior, or lethargy
- Coughing or noisy breathing
- Difficulty breathing or marked throat swelling
- Weight loss, recurrent discharge, or repeated positive tests after recovery
See your vet immediately if your donkey has trouble breathing, cannot swallow normally, stops eating, or has rapidly enlarging throat swelling. Even milder cases deserve prompt attention because strangles spreads easily and early isolation can protect the rest of the herd. If one donkey has a fever or nasal discharge, assume the whole group may have been exposed until your vet helps sort out testing and quarantine.
What Causes Strangles in Donkeys?
Strangles is caused by the bacterium Streptococcus equi subspecies equi. It spreads through direct contact with infected equids and through contaminated items such as water troughs, buckets, lead ropes, tack, trailers, feed tubs, and handlers' hands or clothing. Because the organism is highly contagious, one sick animal can quickly expose others on the property.
The incubation period is usually about 3 to 14 days after exposure. A donkey may start with fever before the classic swollen lymph nodes appear. During this time, the animal may already be shedding bacteria and infecting others.
Recovered donkeys can still be part of the problem. Some continue shedding for several weeks after clinical recovery, and a smaller number become long-term carriers, often because bacteria persist in the guttural pouches. These silent carriers can trigger new outbreaks months later if they are not identified and managed with your vet.
How Is Strangles in Donkeys Diagnosed?
Diagnosis starts with your vet's exam, temperature history, and a close look at the donkey's nasal discharge, lymph nodes, and breathing. Because several equine respiratory diseases can look similar early on, testing matters. Your vet may recommend PCR testing or bacterial culture from a nasal or nasopharyngeal sample, material from a draining abscess, or a guttural pouch wash.
PCR is widely used because it can detect bacterial DNA quickly and sensitively. Culture can also confirm infection, especially from abscess material. In donkeys that have recovered but may still be spreading disease, guttural pouch endoscopy and lavage are especially useful because the guttural pouches are a common hiding place for persistent infection.
During an outbreak, diagnosis is not only about the sick donkey in front of you. Your vet may advise repeated temperature checks for all exposed equids, grouping animals by infection status, and follow-up testing before release from quarantine. In many settings, screening for shedding is delayed until at least 3 weeks after clinical signs resolve, because animals may continue to shed during recovery.
Treatment Options for Strangles in Donkeys
Spectrum of Care means you have options. Here are treatment tiers at different price points.
Budget-Conscious Care
- Farm call or ambulatory exam
- Isolation and biosecurity plan for the donkey and exposed herd mates
- Temperature monitoring once to twice daily
- Basic PCR or culture sample collection
- Supportive care such as rest, soft palatable feed, hydration support, and anti-inflammatory medication if your vet recommends it
- Warm compresses and supervised abscess maturation/drainage planning when appropriate
Recommended Standard Treatment
- Full veterinary exam and herd risk assessment
- PCR and or culture testing from nasal, nasopharyngeal, or abscess samples
- Anti-inflammatory medication and supportive care tailored to appetite, fever, and comfort
- Abscess management directed by your vet
- Targeted antibiotic use when clinically indicated, such as severe early disease, high fever, dysphagia, or risk of complications
- Recheck exam and release-from-quarantine testing plan
Advanced / Critical Care
- Referral or hospital-level care for severe disease
- Endoscopy and guttural pouch lavage with targeted sampling
- IV fluids, intensive nursing care, and repeated monitoring
- Management of airway compromise, severe dysphagia, or metastatic strangles
- Advanced imaging or additional bloodwork when complications are suspected
- Carrier-state treatment and retesting after guttural pouch therapy
Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.
Questions to Ask Your Vet About Strangles in Donkeys
Bring these questions to your vet appointment to get the most out of your visit.
- Which test is best for my donkey right now: PCR, culture, or both?
- Does my donkey need antibiotics, or is supportive care the better option at this stage?
- How should I separate sick, exposed, and apparently clean animals on my property?
- How long should quarantine last, and what testing is needed before release?
- Should we scope and flush the guttural pouches if my donkey keeps testing positive or has recurrent discharge?
- What signs would mean the swelling is affecting breathing or swallowing and needs urgent care?
- What cleaning and disinfection steps matter most for buckets, troughs, tack, and trailers?
- Is strangles vaccination appropriate for the rest of my herd after this outbreak, or should we wait?
How to Prevent Strangles in Donkeys
Prevention starts with biosecurity. New arrivals should be isolated for about 14 to 21 days, with daily monitoring for fever, nasal discharge, and swollen lymph nodes. Avoid shared water sources, feed tubs, tack, and grooming tools during that period. If any equid returns from a show, sale, transport event, or outside boarding situation, your vet may advise a similar temporary separation.
During an outbreak, separate animals into three groups whenever possible: clinically sick, exposed but not sick, and clean. Use dedicated buckets, halters, lead ropes, and caretakers for each group if you can. Hand hygiene, protective clothing, and careful cleaning of contaminated equipment are important. Detergent cleaning followed by an appropriate disinfectant is commonly recommended for surfaces and gear.
Carrier detection is a major part of prevention. Some donkeys and horses continue shedding for weeks after they look normal, and a few remain long-term carriers because infection persists in the guttural pouches. Your vet may recommend follow-up testing after recovery, especially before ending quarantine or introducing recovered animals back into the herd.
Vaccination can be part of prevention on some properties, but it is not a one-size-fits-all decision. Current equine guidance generally reserves strangles vaccination for animals or farms at meaningful risk rather than routine use everywhere. Your vet can help weigh outbreak history, travel, herd structure, and recent exposure before deciding whether vaccination fits your donkey's situation.