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New fungal nail infections

Iorizzo, Matilde; Piraccini, Bianca Maria; Tosti, Antonella

Current Opinion in Infectious Diseases: April 2007 - Volume 20 - Issue 2 - p 142–145
doi: 10.1097/QCO.0b013e32802ef47e
Skin and soft tissue infections

Purpose of review The number of people affected by onychomycosis continues to increase. The prevalence of different pathogens in different areas depends on several factors, such as climate, geography and migration. We reviewed the recent literature to identify new agents responsible for onychomycosis.

Recent findings Recent studies performed in different countries are not only reporting molds and yeasts as contaminants, but are increasingly reporting them as pathogens. Infection by novel agents is also being reported, although the individual cases do not necessarily indicate that these are emerging agents.

Summary Clinicians should bear in mind the increased number of case series reporting the role of molds and yeasts in onychomycosis, and should not treat the disease without first examining the mycology results. The question remains as to whether these agents are truly new fungi responsible for onychomycosis, or whether improvement of diagnostic techniques and increasing reference to such species in the literature has resulted in better identification of such agents.

Department of Dermatology, University of Bologna, Bologna, Italy

Correspondence to Matilde Iorizzo, MD, Department of Dermatology, University of Bologna, V. Massarenti 1, 40138, Bologna, Italy Tel: +39 051 341820; fax: +39 051 347847; e-mail:

© 2007 Lippincott Williams & Wilkins, Inc.