Blastomycosis is a high-severity respiratory condition that can affect dogs of all ages and breeds. Blastomycosis is a fungal infection caused by Blastomyces dermatitidis, prevalent in North America near waterways. Dogs are 10 times more susceptible than humans and often present with severe pneumonia, skin lesions, and eye involvement. It is documented across 1 breed, though prevalence and severity can differ significantly between them. It typically becomes apparent at Any age. Early signs to watch for include severe respiratory distress, fever, weight loss, and skin nodules and draining tracts. When treatment is required, costs are estimated at £1,500-£5,000 depending on severity, location, and the specific intervention needed. This page covers symptoms, treatment options, and preventive steps — along with breed-specific information where available.

Signs & Symptoms

The following symptoms are commonly associated with Blastomycosis in dogs. If your dog displays several of these signs, consult your vet promptly — early diagnosis typically leads to better outcomes.

• Severe respiratory distress
• Fever
• Weight loss
• Skin nodules and draining tracts
• Ocular inflammation and blindness
• Lymphadenopathy

Treatment Overview

Itraconazole is the drug of choice for non-life-threatening cases. Amphotericin B is used for severe pulmonary disease. Treatment lasts 2-3 months minimum. Prognosis is guarded for severe cases; ocular involvement often means enucleation.

Typical onset: Any age

Prevention & Screening

While not all cases of Blastomycosis can be prevented, the following steps reduce risk or enable earlier intervention:

• Avoid endemic areas near waterways if possible
• Do not allow dogs to dig in contaminated soil