It appears as though this fungus can infect any mammal. That being said, I wouldn’t worry too much. There isn’t much information about rabbits, but there is when it comes to humans, dogs, cats, etc. Most individuals that become infected are asymtomatic (as much as 60%). So my guess is that it is probably similar for rabbits. Treatment is mostly supportive therapy. The symptom that worries me is the skin lesions/abscesses.
PetMD has the symptoms for dogs:
Fever
Lethargy
Lameness
Coughing (can be either dry and harsh, or moist)
Difficulty breathing
Bone swelling/joint enlargement
Extreme weight loss with muscle wasting
Enlarged lymph nodes (lymphadenitis)
Skin ulcers and draining sores
Inflammation of the iris and other front parts of the eye
Inflammation of the cornea
For cats:
- Extreme weight loss and muscle wasting
- Draining skin lesions
- Difficulty breathing
- Lameness
- Inflammation of the iris and other areas in the front part of the eye.
This infection is less common in cats, and the spread of the infection tends to behave somewhat differently than with other animals. Cats typically do not show the same symptoms that dogs do, and may even remain asymptomatic until the infection has spread significantly. In cats, the deeper layers of skin tissue are more likely to be affected. Symptoms like masses, abscesses, and lesions with draining occur more often with cats.
To be safe, perhaps it would be better if you kept your bunny inside. If she likes to dig, you could make her an indoor dig box.