To prevent respiratory infections in pet reptiles, it is important to maintain proper husbandry practices. This includes providing a suitable enclosure with the correct temperature and humidity levels, as well as ensuring proper ventilation. Additionally, it is essential to regularly clean and sanitize the enclosure, provide a balanced diet, and avoid exposing the reptile to smoke, fumes, or other respiratory irritants. Regular veterinary check-ups can also help in early detection and prevention of respiratory infections.