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Efficacious treatment of non-dermatophyte mould onychomycosis with topical amphotericin B
Massimo Lurati1, Florence Baudraz-Rosselet, Maxime Vernez
1Department of Dermatology, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland.
Background:
Dermatophytes are the main cause of onychomycosis, but various non-dermatophyte moulds (NDMs) are often the infectious agents in abnormal nails. In particular, Fusarium spp. and other NDMs are mostly insensitive to standard onychomycosis treatment with topical agents as well as with oral terbinafine and itraconazole.
Objective:
The aim of this work is to report the efficacy of a topical amphotericin B solution on NDM onychomycosis in a series of 8 patients resistant to multiple conventional topical and systemic treatments.
Methods:
Treatment consisted in the application of an optimized amphotericin B solution once daily to the affected nails and surrounding tissue. No mechanical debridement or medications were allowed except for trimming excessively long nails or in some cases occasionally applying urea-based cream to soften thickened nail plates.
Results:
Onychomycosis was clinically cured in all patients after a 12-month treatment. Mycological cure was obtained in all but 1 patient.
Conclusions:
Topical amphotericin B is an efficacious, safe, cheap and easy-to-apply treatment which should be considered as first-line therapy for NDM onychomycosis.
Insights
Topical amphotericin B effectively treated non-dermatophyte mould (NDM) onychomycosis in patients resistant to standard therapies. This safe and affordable treatment offers a promising solution for difficult-to-treat nail infections.
Area of Science:
- Mycology
- Dermatology
- Infectious Diseases
Background:
- Non-dermatophyte moulds (NDMs) are increasingly implicated in onychomycosis, particularly in nails with existing abnormalities.
- Many NDMs, including Fusarium spp., exhibit resistance to conventional topical and systemic antifungal treatments like terbinafine and itraconazole.
- This resistance poses a significant challenge for effective onychomycosis management.
Observation:
- This study evaluated the efficacy of a novel topical amphotericin B solution for treating NDM onychomycosis.
- Eight patients with treatment-resistant NDM onychomycosis participated in the study.
- The treatment involved daily application of the optimized amphotericin B solution to affected nails and surrounding skin.
Findings:
- Clinical cure of onychomycosis was achieved in all 8 patients after a 12-month treatment period.
- Mycological cure was observed in 7 out of 8 patients.
- The topical amphotericin B treatment demonstrated high efficacy in resolving NDM onychomycosis.
Implications:
- Topical amphotericin B presents a safe, cost-effective, and user-friendly therapeutic option for NDM onychomycosis.
- This treatment should be strongly considered for NDM onychomycosis, especially in cases resistant to standard therapies.
- Further research may establish topical amphotericin B as a first-line treatment for NDM onychomycosis.
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