Encephalitozoon cuniculi
Encephalitozoon cuniculi was virtually unrecognized as a cause of disease in pet rabbits until a few years ago. Nowadays it is much more widely diagnosed amongst pet rabbits, with owners of affected rabbits wanting to learn as much as possible in order to give their rabbits the best care possible. However, the disease isn't a straightforward one, and there is still a lot that we don't understand about it, so it does take some explaining in order to understand what it is, what it does and how it is currently treated.
Head tilt in a rabbit infected with Encephalitozoon cuniculi
©Richard Saunders