Turtle Shell Fungus (Shell Rot)

Turtle Shell Fungus (Shell Rot)
Introduction: Shell fungus, often referred to as "Shell Rot," is a common health issue in turtles, especially those kept in environments with poor hygiene or improper lighting. It can affect both the upper shell (carapace) and the lower shell (plastron).

Causes:

Poor Water Quality: Accumulated waste and bacteria in the water can lead to fungal growth.
Inadequate Lighting: Lack of UV (UVA/UVB) rays from sunlight or specialized lamps prevents the shell from drying properly and kills beneficial bacteria.
High Humidity/Wet Substrate: For land turtles, living in a damp or soiled environment without dry areas can trigger the infection.
Injuries: Scratches or cracks on the shell provide an entry point for fungus and bacteria.
Symptoms to Look For:

White or Grey Patches: Discolored spots on the shell that may look fuzzy or powdery.
Soft Spots: Parts of the shell feeling soft or spongy to the touch.
Pitting or Eroded Areas: Small holes or "pits" appearing on the surface of the shell.
Foul Odor: In severe cases (bacterial involvement), the affected area may emit a bad smell or discharge fluid.
Prevention and Treatment:

Clean Environment: Change water regularly and ensure the filtration system is effective.
Sunlight and Basking: Provide a dry basking area with proper UVB lighting to help strengthen the shell and kill fungus.
Early Treatment: If symptoms are mild, keepers often use diluted povidone-iodine (Betadine) or specialized antifungal ointments. However, the shell must be kept dry (dry-docking) for a period after applying medication.
Consult a Vet: If the infection spreads or the shell becomes soft/deeply pitted, it is crucial to see an exotic pet veterinarian for professional debridement and antibiotics.