Respiratory Infections in Crested Geckos: Signs, Causes, and Treatment

Respiratory infections are illnesses that affect the airways and lungs. In crested geckos, they are often grouped under the term respiratory infection or pneumonia, even though the problem can range from mild upper-airway irritation to deeper lung disease. Reptiles are especially sensitive to environmental stress, so breathing problems often develop when the enclosure setup is not supporting normal immune function.

Common signs include open-mouth breathing, wheezing, clicking, excess mucus, nasal discharge, and lethargy. Some geckos also stop eating, hold their head elevated, or seem less active at night. Because crested geckos are small and tend to hide illness, even subtle breathing changes deserve attention.

These infections are not always caused by one single germ. Bacteria are common, but fungi, parasites, and secondary infections can also play a role. In many cases, the infection develops after husbandry issues such as low environmental temperatures, poor sanitation, crowding, or chronic stress weaken the gecko's defenses.

The good news is that many crested geckos do recover when the problem is caught early and your vet addresses both the infection and the enclosure conditions that allowed it to happen.

Respiratory infections in crested geckos usually happen when pathogens meet stress. Bacteria are a common cause, but fungal organisms, parasites, and mixed infections are also possible. In some geckos, a mouth infection or another illness can spread or lower the immune system enough for a respiratory infection to take hold.

Husbandry problems are a major trigger. Reptile references consistently note that low environmental temperatures, poor sanitation, overcrowding, malnutrition, and stress increase the risk of respiratory disease. For crested geckos specifically, keeping the enclosure too cool for long periods can slow metabolism and immune function, while constantly wet conditions without a dry-out period can encourage mold and microbial growth.

Humidity problems can go in either direction. Crested geckos do best with moderate-to-high humidity that cycles down between mistings, not a cage that stays soggy all day. Poor ventilation, dirty substrate, stagnant air, and buildup of waste can all make the enclosure less healthy for the lungs.

Other contributors include recent shipping, frequent handling in a stressed gecko, co-housing, exposure to smoke or aerosolized irritants, and underlying disease. Your vet will look at the whole picture, because treating the infection without fixing the setup often leads to relapse.

Your vet will start with a physical exam and a detailed husbandry review. Expect questions about daytime and nighttime temperatures, humidity pattern, misting schedule, ventilation, substrate, cleaning routine, diet, supplements, recent stress, and whether other reptiles are in the home. This history matters because enclosure conditions are often part of the cause.

Diagnosis may be based on exam findings in mild cases, but many geckos benefit from additional testing. Your vet may recommend radiographs (X-rays) to look for fluid or changes in the lungs, along with fecal testing, bloodwork when feasible, or swabs and culture if discharge is present. In more complex cases, reptile references describe airway or lung washes to help identify the organism involved.

These tests help your vet separate respiratory infection from other problems that can also cause abnormal breathing, such as severe dehydration, masses, retained shed blocking the nostrils, stomatitis, or systemic illness. They also help guide medication choices rather than guessing.

Because crested geckos are delicate patients, the diagnostic plan is often tailored to what is safest and most useful in that moment. A stable gecko may start with exam plus husbandry correction, while a gecko in distress may need oxygen and stabilization before more testing.

Prevention starts with husbandry. Keep your crested gecko's enclosure within an appropriate temperature range, and avoid letting it stay chronically cool. Crested geckos also need humidity that rises with misting and then falls again, rather than a habitat that stays constantly wet. Good airflow matters, too.

Clean the enclosure regularly, remove waste promptly, and replace dirty substrate before it becomes damp and contaminated. Fresh water, a balanced diet, and reduced stress all support immune health. If you bring home a new reptile, quarantine it and avoid sharing tools between enclosures until your vet says it is safe.

Try to limit respiratory irritants in the home. Smoke, aerosol sprays, strong cleaners, and dusty or moldy cage materials can all make the airways less healthy. If your gecko has had a previous respiratory problem, ask your vet what husbandry targets are most important for that individual.

Routine wellness visits with your vet can help catch subtle weight loss, dehydration, mouth disease, or enclosure issues before they turn into a breathing emergency. In reptiles, prevention is often less about one product and more about getting the whole environment consistently right.