Infectious Stomatitis in Agamas
Infectious stomatitis, sometimes called "mouth rot," is an oral infection that commonly affects agamas and other lizards in captivity. It is characterized by inflammation of the gums and mouth tissues, caused by bacteria that take advantage...
What is it?
Infectious stomatitis, sometimes called "mouth rot," is an oral infection that commonly affects agamas and other lizards in captivity.
It is characterized by inflammation of the gums and mouth tissues, caused by bacteria that take advantage of a weakened animal or a minor wound to develop.
Without treatment, the infection can spread to the jaw bone and become severe, even threatening the animal's life.
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:
Early signs are often subtle: the agama eats less or refuses food, and may appear less active than usual.
On examining the mouth, redness of the gums may be noticed, sometimes with slight bleeding, or yellowish to whitish deposits along the teeth.
Increased or thickened saliva, foul breath odor, and difficulty grasping or swallowing prey are also characteristic.
In more advanced cases, visible swelling of the jaw may develop, indicating the infection has reached the deeper tissues.
The animal may also become lethargic and hide more than usual.
When to consult without delay
This list does not replace veterinary advice. It gathers situations that justify a prompt consultation.
Causes and risk factors
Infectious stomatitis is most often due to overgrowth of bacteria normally present in the reptile's mouth, which become harmful when the balance is disrupted.
A minor mouth wound—caused for example by overly aggressive live prey, an object in the enclosure, or trauma—can serve as an entry point for infection.
A weakened immune system, often linked to poor living conditions, also promotes disease development.
The main risk factors are related to captive conditions: inappropriate temperature or humidity in the enclosure, insufficient UV exposure, or imbalanced diet weaken the animal.
Chronic stress, a poorly maintained or crowded enclosure, and nutritional deficiencies—especially in calcium and vitamins—increase the agama's vulnerability.
Repeat mouth injuries, for example from unsuitable live prey, are a frequent triggering factor.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
A reptile veterinarian performs a thorough examination of the oral cavity to assess the extent of lesions.
Swabs may be taken to identify the bacteria involved and guide treatment selection.
In advanced cases, radiographs may be needed to check whether infection has reached the jawbone.
An overall assessment of the animal's general health and living conditions typically forms part of the consultation.
Treatment
Treatment usually relies on antibiotics selected by the veterinarian based on evaluation.
Local oral debridement may be performed to remove infected deposits.
In severe cases, surgical debridement of affected tissue may be necessary.
Correction of husbandry conditions (temperature, diet, humidity) is an integral part of care to support healing.
Nutritional support, or temporary assisted feeding, may be offered if the animal stops eating on its own.
Treatment depends on the cause and the animal's condition: it must be determined by a veterinarian. No self-medication.
Prevention
Prevention centers on maintaining proper husbandry conditions: temperature, humidity, and UVB lighting suited to the species.
A varied and balanced diet, supplemented with calcium and vitamins as needed, helps maintain good overall health.
Regular inspection of the animal's mouth during handling is recommended, and live prey that is too large or aggressive should not be left unsupervised.
Regular terrarium cleaning also limits bacterial growth.
Possible complications
If left untreated, the infection can spread to the jawbones, causing osteomyelitis that is difficult to treat.
It may also spread to other organs through the bloodstream, leading to a generalized infection that can be fatal.
Tooth loss, jawbone deformity, and inability to feed properly are possible consequences of chronic forms.
When to see a veterinarian
The agama has refused to eat for several days.
Redness, bleeding, or abnormal deposits are visible in the mouth.
Swelling of the jaw or face is noticed.
An unusual bad odor from the mouth is detected.
The animal becomes unusually lethargic or hides constantly.
Prognosis
The prognosis is good if the disease is detected and treated early, with most cases responding well to treatment.
However, if infection has reached the bone or become generalized, the prognosis is more guarded and recovery is longer and uncertain.
Lasting improvement also depends on correcting the living conditions that caused the problem.
Frequently asked questions
Is infectious stomatitis contagious to other reptiles in the terrarium?
The risk of direct transmission between animals is considered low, but a poorly maintained terrarium can promote the disease in multiple individuals. It is prudent to isolate a sick animal and have the others checked by a veterinarian.
Can this disease be treated without going to the veterinarian?
No, it is strongly advised against attempting treatment alone. Only a veterinarian can assess the severity of the infection and prescribe appropriate treatment, as there is otherwise a risk of the disease worsening.
How long does the treatment last?
The duration varies depending on the severity of the injuries, ranging from a few weeks for mild cases to several months for more advanced cases affecting the bone.
How can I tell if my agama has a mouth problem?
A suffering agama may eat less, drool excessively, avoid chewing, or become more withdrawn. Regular visual examination of the mouth can help detect signs early.
References
AVMA — American Veterinary Medical Association
Content reviewed by the TunisieVet editorial team · Updated 30 September 2026
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