Pneumonia in wall lizards
Pneumonia is an inflammation of the lungs, most often of infectious origin. In the wall lizard (Podarcis muralis), a small reptile very sensitive to the conditions of its environment, this disease affects the respiratory system and can quic...
What is it?
Pneumonia is an inflammation of the lungs, most often of infectious origin. In the wall lizard (Podarcis muralis), a small reptile very sensitive to the conditions of its environment, this disease affects the respiratory system and can quickly endanger its life. Like all reptiles, this lizard regulates its body temperature thanks to its environment (we speak of an ectothermic animal): a poorly regulated terrarium strongly favors the appearance of this disease.
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It is common in animals kept in captivity (terrariophilia), particularly when housing conditions are not suitable for the species.
Key point
Untreated pneumonia can quickly progress to severe respiratory distress in such a small and fragile animal; Any visible difficulty breathing should be considered an emergency.
Commonly observed signs
These signs are neither exhaustive nor specific. Only a veterinarian can establish a diagnosis.
Related signs — each one links to its page:
The signs are often discreet at first, because lizards naturally hide their discomfort. Breathing may become more difficult, sometimes accompanied by noises (whistling, crackling) or opening of the mouth to breathe.
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A discharge from the nostrils or mouth may appear, sometimes thick. The animal often shows marked depression, refuses to eat, remains motionless or hides more than usual.
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In advanced forms, the lizard adopts an abnormal position, with its head raised to facilitate breathing, and shows progressive weight loss.
When to consult without delay
This list does not replace veterinary advice. It gathers situations that justify a prompt consultation.
Causes and risk factors
Pneumonia in wall lizards is most often caused by opportunistic bacteria which take advantage of a weakening of the animal to develop in the respiratory tract. Viral or fungal agents can also be involved, sometimes in association with bacteria. \n In the vast majority of cases, the root cause is poor breeding conditions: unsuitable temperature, excessive or insufficient humidity, poor ventilation of the terrarium, or chronic stress which weakens the animal's natural defenses.
The main risk factors are linked to the captivity environment: terrarium temperature too low preventing correct regulation of body temperature, poorly controlled humidity, cold air currents, absence of a suitable heating zone (hot spot) or thermal gradient.
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A poorly cleaned terrarium, contaminated water, overpopulation of animals or stress linked to transport or frequent handling also increase the risk. A lizard already weakened by internal parasites or chronic illness is more vulnerable.
Transmission
Certain respiratory infectious agents can be transmitted by direct contact between reptiles or by a contaminated shared environment, particularly in the case of a common terrarium.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
The veterinarian specializing in exotic animals begins with a complete clinical examination, observing the animal's breathing, general condition and behavior. He also researches the breeding conditions by asking specific questions about the terrarium.
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Additional examinations may be offered, such as an x-ray to visualize the lungs, a sample from the respiratory tract to identify the agent in question, or a blood test if the size of the animal allows it. These examinations help guide the most appropriate treatment.
Treatment
Treatment is based on antibiotic therapy adapted to the identified or suspected agent, sometimes combined with antifungal treatment if necessary. Supportive care is often essential: rehydration, immediate correction of terrarium parameters (temperature, humidity), and sometimes feeding assistance.
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Correcting breeding conditions is an essential pillar of treatment: without this, even well-conducted drug treatment can fail. Any prescription must be established by a veterinarian, as reptiles have a particular metabolism requiring specific adjustments.
Treatment depends on the cause and the animal's condition: it must be determined by a veterinarian. No self-medication.
Prevention
Prevention is based above all on housing conditions adapted to the species: a terrarium offering a correct temperature gradient, with a warm zone and a cooler zone, controlled hygrometry, and good ventilation without direct drafts.
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It is recommended to clean the terrarium regularly, offer a varied and appropriate diet, and limit sources of stress (excessive handling, poorly managed cohabitation). Quarantine is recommended for any new animals introduced, in order to avoid the introduction of infectious agents.
Possible complications
Without treatment, pneumonia can progress to severe respiratory failure, exhaustion of the animal due to refusal to eat, or even death. Complications such as septicemia (generalized infection) are possible in very weakened animals.
When to see a veterinarian
The lizard has difficulty breathing or keeps its mouth open abnormally.
A discharge appears from the nose or mouth.
The animal has refused to eat for several days.
He remains abnormally still, hidden, or very depressed.
Unusual breathing sounds are heard.
Prognosis
The prognosis depends on the speed of treatment. Detected early and associated with a correction of accommodation conditions, pneumonia can progress favorably. At an advanced stage, the prognosis becomes more guarded, reptiles being animals that mask their symptoms for a long time before showing visible signs.
Frequently asked questions
Is wall lizard pneumonia contagious to other reptiles?
Certain infectious agents responsible can be transmitted between reptiles, especially in the event of cohabitation. It is prudent to isolate a sick animal and consult a veterinarian before releasing it with others.
Can you treat lizard pneumonia without a veterinarian?
No. Reptiles require very specific treatments and dosages. Self-medication can worsen the animal's condition or delay effective treatment.
How do you know if the terrarium is the cause?
A veterinarian specializing in exotic animals can evaluate the temperature, humidity and ventilation of the terrarium with you to identify any unsuitable settings.
Can a wild wall lizard get pneumonia?
It is possible but much rarer than in captivity, the disease being mainly favored by unsuitable breeding conditions.
References
AVMA — American Veterinary Medical Association
Content reviewed by the TunisieVet editorial team · Updated 18 August 2026
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