A–Z topic · E
E. cuniculi in rabbits
Quick answer
**E. cuniculi is a common UK rabbit parasite** affecting brain, kidneys, and eyes. Many rabbits show no signs; others develop head tilt, cataracts, or kidney disease. If your rabbit has neurological signs, phone your rabbit-savvy vet — early fenbendazole treatment and supportive care improve outcomes.
Key takeaways
- Mainly from the mother before birth, or from urine of infected rabbits. Spores can survive in the environment. It is very common in UK rabbit populations.
- Treatment with fenbendazole can reduce parasite load and improve symptoms, especially if started early. Some damage — particularly to the brain or kidneys — may be permanent.
The full guide
Causes, symptoms, treatment options and when to call your vet — in the complete plain-English guide.
Frequently Asked Questions
- What is E. cuniculi in rabbits?
- E. cuniculi (Encephalitozoon cuniculi) is a microscopic parasite that infects rabbits' kidneys, brain, and eyes. Many rabbits carry it without symptoms; stress or illness can trigger head tilt, kidney problems, or cataracts.
- How do rabbits get E. cuniculi?
- Mainly from the mother before birth, or from urine of infected rabbits. Spores can survive in the environment. It is very common in UK rabbit populations.
- Can E. cuniculi be cured in rabbits?
- Treatment with fenbendazole can reduce parasite load and improve symptoms, especially if started early. Some damage — particularly to the brain or kidneys — may be permanent.