Mycoplasma Infection in Sulcata Tortoises

Mycoplasma infection, often called mycoplasmosis, is a contagious bacterial disease that affects the upper respiratory tract of tortoises. In tortoises, mycoplasma is strongly associated with upper respiratory tract disease, which can show up as nasal discharge, eye irritation, and reduced energy. Merck notes classic signs such as nasal discharge and conjunctivitis, and VCA lists mycoplasma as a common cause of respiratory infection in tortoises.

In a sulcata tortoise, this problem may start subtly. A pet parent might first notice damp nostrils, bubbles at the nose, puffy eyes, or a tortoise that is less interested in food. Because tortoises often hide illness until they are quite sick, even mild signs deserve attention.

Mycoplasma infections can range from mild upper airway irritation to more serious respiratory disease. Some tortoises may also carry infection with few outward signs, which is one reason quarantine and careful introduction of new tortoises matter so much. Your vet can help sort out whether mycoplasma is likely, or whether another problem such as poor husbandry, another bacterial infection, or lower airway disease is involved.

Mycoplasma is a type of bacteria that can spread between tortoises through close contact and respiratory secretions. In tortoises, species such as Mycoplasma agassizii and Mycoplasma testudineum have been linked with upper respiratory tract disease. Infection may be introduced by a newly acquired tortoise, a tortoise with a past history of respiratory signs, or contact with contaminated secretions during shared housing or handling.

Husbandry stress often plays a major role in whether a sulcata becomes sick. PetMD notes that excessively cool or damp conditions can contribute to respiratory infections in tortoises, and arid tortoise care guidance warns that overly humid, poorly ventilated housing can increase risk. In practice, common triggers include low enclosure temperatures, poor ventilation, chronic stress, crowding, transport, and inadequate nutrition.

Not every tortoise with respiratory signs has mycoplasma alone. Secondary bacterial infections, viral disease, and lower respiratory infections can look similar. That is why your vet will usually ask detailed questions about heat, humidity, substrate, UVB exposure, diet, recent additions to the household, and whether any other tortoises have shown signs.

Diagnosis starts with a hands-on exam and a careful review of husbandry. Your vet will look for nasal discharge, eye inflammation, abnormal breathing sounds, dehydration, poor body condition, and signs that the enclosure setup may be contributing to illness. PetMD emphasizes that a detailed husbandry history is an important part of working up respiratory disease in reptiles.

Testing depends on how sick your sulcata is. VCA notes that radiographs, blood tests, and cultures may be recommended for tortoise respiratory infections. PetMD also notes that radiographs can help identify fluid, inflammation, or other changes in the lungs, and advanced cases may require airway sampling such as a tracheal or lung wash. For suspected mycoplasma specifically, PCR testing on nasal lavage or related samples may be used, but published reviews note that false negatives can happen if organism levels are low or sampling misses affected areas.

Because no single test is perfect, diagnosis is often a combination of exam findings, history, imaging, and targeted lab work. Your vet may also reassess after husbandry corrections and early treatment response. That stepwise approach helps match care to the tortoise, the severity of disease, and the pet parent's goals and budget.

Prevention starts with strong husbandry and careful quarantine. New tortoises should be kept completely separate from established tortoises for an extended observation period, with separate tools, dishes, and hand hygiene between animals. This matters because some tortoises can carry respiratory pathogens with mild or intermittent signs.

Sulcatas do best when their environment supports normal immune function. Keep temperatures appropriate and stable, avoid chronically damp or poorly ventilated housing, provide proper UVB exposure, and feed a species-appropriate, high-fiber diet. PetMD notes that cool or damp conditions can contribute to respiratory infections, and arid tortoise guidance warns that trapped humidity and poor airflow can raise risk.

Routine wellness visits with a reptile-savvy veterinarian can also help. Your vet can review husbandry, body condition, growth, and any subtle respiratory changes before they become severe. If one tortoise in a group develops nasal discharge or eye swelling, isolate that tortoise promptly and schedule an exam. Early action is often the most practical way to limit spread and reduce the overall cost range of care.