Cryptococcus is the most common fungal disease seen in cats on the Eastern coast of Australia. Luckily it is a rare disease, that is not contagious (i.e. cannot spread between cats or to people). Cats normally will become infected through breathing in the fungi from the environment. Eucalyptus leaves and pigeon droppings are risk factors.
Cryptococcus can cause disease in different ways, but more commonly affects the nose, brain and skin. Very rarely it can occur throughout the whole body. Signs may include lumpy growths over the bridge of the nose, ulcerations, sneezing sometimes with blood, blindness or other neurological signs.