A 1-year-old male golden retriever-poodle crossbred dog was brought to a veterinary clinic with a 1-month travel history to Muskoka, Ontario and a 1-week history of left eye irritation and ocular discharge. Ophthalmic examination and blood analysis revealed bilateral uveitis with a normal complete blood (cell) count and biochemistry panel. Symptomatic treatment was administered with no improvement observed and the dog returned 2 weeks later for assessment of a draining swelling of the left hind 4th digit. Clinical examination of thoracic radiographs and abdominal ultrasound showed evidence of disseminated blastomycosis characterized by pulmonary lesions, and multifocal lymphadenopathy. Biopsy of the draining lesion and cytological examination of an enlarged lymph node established diagnosis. The dog was started on a standard antifungal treatment protocol (itraconazole) but returned after 11 d of treatment with neurological signs including ataxia, paraparesis, left head tilt, and compulsive turning. Humane euthanasia was chosen and the diagnosis was confirmed at postmortem examination.
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