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Blastomycosis in Ontario, 1994-2003.
Shaun K Morris1, Jason Brophy, Susan E Richardson
1Hospital for Sick Children, Toronto, Ontario, Canada.
Emerging Infectious Diseases
|February 24, 2006
Summary
Blastomycosis cases in Ontario have increased, particularly in Northern regions. This fungal infection, caused by Blastomyces dermatitidis, requires clinical awareness and potentially reclassification as a reportable disease.
Area of Science:
- Mycology
- Infectious Diseases
- Epidemiology
Background:
- Blastomycosis is a fungal infection caused by Blastomyces dermatitidis.
- Understanding its epidemiology is crucial for public health management.
Observation:
- A case of blastomycosis with osteomyelitis and pulmonary involvement in an 8-year-old boy is presented.
- 309 cases were identified in Ontario over a 10-year period, with a notable increase from 2001-2003.
Findings:
- The overall incidence in Ontario was 0.30 per 100,000, significantly higher in Northern Ontario (2.44 per 100,000).
- Children under 19 accounted for 13% of cases.
- Northwestern Ontario is identified as an endemic or hyperendemic area.
Implications:
- Clinicians need to be aware of Blastomyces dermatitidis symptoms and endemic regions.
- Reinstating blastomycosis as a reportable disease in Ontario is recommended for better surveillance.