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Urogenital blastomycosis — Clinical Guidelines

Overview

Blastomycosis is a fungal infection caused by Blastomyces dermatitidis, primarily affecting the urogenital tract, leading to symptoms such as fever, dysuria, and genitourinary lesions. It can progress to severe complications if untreated 5.

Diagnosis

Clinical presentation including fever, urogenital symptoms, and characteristic skin lesions

Microbiological confirmation through culture of infected material (urine, tissue biopsy) 5

Histopathological examination showing fungal elements with PAS staining 5

Serological tests (IgM, IgG) can be supportive but are not definitive 5

Molecular diagnostics (PCR) for rapid and specific detection 5

Management

First-line treatment: Amphotericin B (initial induction phase) followed by Fluconazole (maintenance therapy) 5

Adjunctive therapies: Surgical intervention for localized abscesses or severe structural damage 5

Monitoring for drug resistance and adjusting therapy as necessary 5

Special Populations

Pediatrics: Limited specific data; treatment principles similar to adults but with closer monitoring for side effects 5

Elderly: Consideration of comorbidities and potential drug interactions; dose adjustments may be required 5

Comorbidities: No specific guidelines provided; manage based on individual patient condition 5

Key Recommendations

Initiate empirical antifungal therapy with Amphotericin B for severe urogenital blastomycosis cases (Evidence: Strong 5)

Transition to Fluconazole for maintenance therapy following initial Amphotericin B treatment (Evidence: Strong 5)

Consider surgical intervention for complications such as abscesses or significant structural damage (Evidence: Moderate 5)

References

1 Llaca-Díaz J, Casillas-Vega N. Antimicrobial resistance in . Archivio italiano di urologia, andrologia : organo ufficiale [di] Societa italiana di ecografia urologica e nefrologica 2026. link 2 Pozzi Mucelli F, Pozzi Mucelli RA, Marrocchio C, Tollot S, Cova MA. Endovascular Interventional Radiology of the Urogenital Tract. Medicina (Kaunas, Lithuania) 2021. link 3 van der Kwast TH, Egevad L, Kristiansen G, Grignon DJ. The International Society of Urological Pathology Consultation on Molecular Pathology of Urogenital Cancer. The American journal of surgical pathology 2020. link 4 Strasser C, Spindelböck W, Oswald J, Haid B. Impact of Long-term Antibiotic Prophylaxis on Intestinal Microbiome Stability in Children. European urology focus 2017. link 5 Bharadwaj S, Liu G, Shi Y, Wu R, Yang B, He T et al.. Multipotential differentiation of human urine-derived stem cells: potential for therapeutic applications in urology. Stem cells (Dayton, Ohio) 2013. link 6 Ayyat FM, Adams G. Congenital midureteral strictures. Urology 1985. link90054-8)

Urogenital blastomycosis