Mycoplasma Infection in Sulcata Tortoises: Upper Respiratory Disease Explained
- See your vet immediately if your sulcata tortoise has nasal discharge, swollen or crusty eyes, open-mouth breathing, wheezing, or stops eating.
- Mycoplasma is a bacterial cause of upper respiratory disease in tortoises. It can spread between tortoises and may flare during stress or poor husbandry.
- Diagnosis often includes a physical exam, review of enclosure temperatures and humidity, and may include PCR testing, cytology, culture, bloodwork, or radiographs.
- Treatment is not one-size-fits-all. Your vet may recommend supportive care, husbandry correction, fluids, and antibiotics based on exam findings and test results.
- Mild outpatient cases often fall around $150-$450, while testing and repeat visits can bring total care to $400-$1,000+. Hospitalized or critical cases may exceed $1,000.
What Is Mycoplasma Infection in Sulcata Tortoises?
Mycoplasma infection is a contagious bacterial disease that can affect a tortoise's upper respiratory tract. In tortoises, respiratory infections are commonly linked to Mycoplasma species, especially Mycoplasma agassizii and Mycoplasma testudineum. These organisms are well known in tortoise upper respiratory tract disease and can cause inflammation of the nose, eyes, and nearby tissues.
In a sulcata tortoise, this often shows up as a runny or bubbly nose, sticky discharge around the nostrils, swollen eyelids, conjunctivitis, or noisy breathing. Some tortoises also become quieter, eat less, or spend more time hiding. Because reptiles are good at masking illness, even mild signs deserve prompt attention.
Mycoplasma disease can range from mild to serious. Some tortoises have intermittent flare-ups, while others develop more severe breathing difficulty or secondary infections. Stress, transport, crowding, poor ventilation, and temperatures outside the species' preferred range can make illness more likely or make signs worse.
This article explains the condition, but it cannot diagnose your tortoise. If your sulcata is showing respiratory signs, your vet should examine them as soon as possible.
Symptoms of Mycoplasma Infection in Sulcata Tortoises
- Clear, cloudy, or bubbly nasal discharge
- Crusting around the nostrils
- Swollen eyelids or conjunctivitis
- Watery, sticky, or crusted eyes
- Sneezing or audible breathing noises
- Open-mouth breathing or increased effort to breathe
- Reduced appetite or refusal to eat
- Lethargy or reduced activity
- Weight loss or dehydration
- Head held extended while breathing
See your vet immediately if your sulcata tortoise has open-mouth breathing, marked effort with each breath, severe eye swelling, weakness, or has stopped eating. Nasal discharge and puffy eyes may look minor at first, but tortoises can decline slowly and then become critically ill. Any respiratory sign that lasts more than a day or two, or keeps returning, should be checked by your vet.
What Causes Mycoplasma Infection in Sulcata Tortoises?
Mycoplasma infection is caused by bacteria that can spread from tortoise to tortoise through close contact and respiratory secretions. In tortoises, upper respiratory disease is often associated with mycoplasma, although other bacteria, viruses, and mixed infections can also be involved. That means a sulcata with nasal discharge may have mycoplasma alone, or mycoplasma plus another problem.
Environmental stress plays a major role. Sulcata tortoises need species-appropriate heat, access to a warm basking area, good ventilation, hydration, and clean housing. When temperatures are too low, the enclosure is poorly ventilated, or hygiene is poor, the immune system may not work as well and respiratory pathogens can gain ground.
Stressors such as shipping, recent rehoming, overcrowding, breeding activity, and mixing new tortoises into an established group can also trigger disease. Some tortoises may carry infection and show few signs until stress causes a flare. That is one reason quarantine matters so much in multi-tortoise homes or rescues.
Because husbandry and infection often overlap, your vet will usually want a full picture of your tortoise's setup. Bring details about daytime and nighttime temperatures, humidity, UVB lighting, substrate, diet, and any recent changes.
How Is Mycoplasma Infection in Sulcata Tortoises Diagnosed?
Diagnosis starts with a hands-on exam by your vet and a careful review of husbandry. Your vet will look at the nostrils, eyes, mouth, breathing effort, body condition, hydration, and weight. They may also ask about enclosure temperatures, humidity, ventilation, UVB exposure, recent additions to the collection, and whether any other tortoises are showing signs.
Testing depends on how sick your tortoise is and what your vet finds on exam. Common options include nasal or choanal swabs for PCR testing to look for respiratory pathogens, cytology or culture of discharge, bloodwork, and radiographs to assess deeper respiratory involvement. In some tortoises, serology may help show exposure, but it does not always prove active disease on its own.
Because respiratory disease in reptiles can be multifactorial, diagnosis is often about building the full picture rather than relying on one test. A positive PCR can support infection, but your vet still has to interpret it alongside symptoms and exam findings. A negative result does not always rule disease out if sampling was limited or the organism was not shedding at that moment.
If your sulcata is very weak, dehydrated, or struggling to breathe, your vet may recommend treatment and stabilization right away while test results are pending.
Treatment Options for Mycoplasma Infection in Sulcata Tortoises
Spectrum of Care means you have options. Here are treatment tiers at different price points.
Budget-Conscious Care
- Exotic pet exam with weight check and breathing assessment
- Immediate husbandry correction plan for heat, ventilation, hydration, and enclosure hygiene
- Outpatient supportive care such as warm environmental support and assisted hydration
- Empirical medication plan if your vet feels treatment is appropriate without advanced testing
- Home monitoring instructions for appetite, discharge, breathing effort, and activity
Recommended Standard Treatment
- Exotic pet exam plus detailed husbandry review
- PCR swab and/or cytology or culture when indicated
- Radiographs and basic bloodwork if deeper respiratory disease or dehydration is suspected
- Targeted medication plan chosen by your vet based on likely organisms and exam findings
- Supportive care such as fluids, nutritional support, and scheduled recheck visits
Advanced / Critical Care
- Urgent or emergency exotic pet evaluation
- Hospitalization for severe breathing difficulty, dehydration, or inability to eat
- Advanced imaging, broader infectious disease testing, and repeated monitoring
- Injectable medications, oxygen support, nebulization, and intensive fluid therapy as directed by your vet
- Assisted feeding and ongoing reassessment for complications or mixed infections
Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.
Questions to Ask Your Vet About Mycoplasma Infection in Sulcata Tortoises
Bring these questions to your vet appointment to get the most out of your visit.
- Do my tortoise's signs fit upper respiratory disease, and how urgent is this today?
- What husbandry issues could be contributing, and what exact temperature and enclosure changes do you want me to make?
- Do you recommend PCR testing, culture, bloodwork, or radiographs for my tortoise's case?
- Is this likely limited to the upper airway, or are you concerned about deeper lung involvement?
- What treatment options do we have at a conservative, standard, and advanced level?
- How will I know if my tortoise is improving versus getting worse at home?
- Should I isolate this tortoise from other tortoises, and for how long?
- When should we schedule a recheck, and what signs mean I should come back sooner?
How to Prevent Mycoplasma Infection in Sulcata Tortoises
Prevention starts with strong daily husbandry. Sulcata tortoises need a clean, well-ventilated enclosure with a reliable thermal gradient, appropriate basking temperatures, access to hydration, and correct UVB lighting. Respiratory disease becomes more likely when tortoises are chilled, stressed, dehydrated, or kept in poorly maintained housing.
Quarantine any new tortoise before introducing them to your existing group. A separate room, separate tools, and careful handwashing can reduce disease spread. This matters because some tortoises may carry respiratory pathogens and only show signs later, especially after transport or other stress.
Routine wellness visits with your vet can help catch subtle problems early. Bring photos of the enclosure and a written list of temperatures, humidity readings, diet, supplements, and recent changes. That information often helps your vet spot preventable risk factors before they turn into illness.
If one tortoise in a group develops nasal discharge or swollen eyes, isolate that tortoise and contact your vet promptly. Early action gives you more treatment options and may help protect the rest of your tortoises.