From the FDA Drug Label
The FDA drug label does not answer the question.
From the Research
Aspergillus terreus onychomycosis can be treated with oral terbinafine as the first-line therapy, typically 250 mg daily for 12 weeks for toenail infections or 6 weeks for fingernail infections, as it has shown excellent fungicidal activity against non-dermatophyte molds, including Aspergillus species 1.
Treatment Options
- Oral terbinafine is the preferred treatment due to its high efficacy and low potential for drug interactions, as demonstrated in studies such as the L.I.ON. study 2.
- Itraconazole is an effective alternative, given as either 200 mg daily for 12 weeks or as pulse therapy (400 mg daily for 1 week per month) for 2-3 pulses for fingernails or 3-4 pulses for toenails.
- Topical treatments like ciclopirox 8% nail lacquer or efinaconazole 10% solution can be used for mild cases or as adjunctive therapy, applied daily to the affected nail for up to 48 weeks.
Considerations
- Aspergillus terreus is a filamentous fungus that can be resistant to amphotericin B, making azoles and terbinafine more effective choices 3.
- Complete cure requires patience as visible improvement may take months due to the slow growth rate of nails.
- Treatment success should be confirmed with follow-up cultures, and patients should be advised to keep nails dry, wear breathable footwear, and avoid sharing nail tools to prevent recurrence.
Clinical Presentation
- The clinical presentation of onychomycosis due to Aspergillus spp. is non-specific but commonly distal-lateral pattern of onychomycosis 1.
- A negative culture with a positive KOH may point to a non-dermatophyte mold, including Aspergillus spp., as the causative agent of onychomycosis.