The fungus, Histoplasma capsulatum, is found in soil mainly in humid areas particularly near bodies of water. Outdoor cats and dogs are more prone to histoplasmosis, especially hunting dogs who travel over all sorts of terrain. While infection can occur at any age, the fungal infection is found mainly in animals under 4 years old.
Symptoms are respiratory problems, appetite and weight loss, fever, cough. Check for pale gums, a sign of anemia.
If your pet shows any of the symptoms, see your veterinarian. Your vet will determine what treatment is necessary, usually an anti-fungal medication.