Aspergillus fumigatus, the causative agent of infection of the frontal sinuses and nasal chambers of the dog.

Twenty-nine cases of nasal aspergillosis out of 150 dogs with nasal discharge were recorded in dogs based on cultural, serologic, radiologic, endoscopic and histopathologic studies. In all of the 29 cases the thermotolerant, rhinotropic Aspergillus fumigatus was cultured from the nasal lesions. The fungal infection mostly occurred in male German shephard dogs, the most common breed of companion dogs, living in apartments.