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Journal of the American Podiatric Medical Association Volume 91 Number 9 456-464 2001
Copyright © 2001 American Podiatric Medical Association

The Diagnosis of Onychomycosis in a Geriatric Population

A Study of 450 Cases in South Florida

William P. Scherer, DPM*, Jon P. McCreary, DPM{dagger} and Walter W. Hayes, DPM{dagger}

* Diplomate, American Board of Podiatric Surgery; private practice, 2430 E Commercial Blvd, Ste B, Fort Lauderdale, FL 33308.
{dagger} Submitted during fourth year, Barry University School of Graduate Medical Sciences, Miami Shores, FL.

Abstract

An investigative study was performed to determine the diagnosis of onychomycosis in a South Florida geriatric population. In this study, 450 cases of suspected onychomycosis involving men and women 65 years of age and older from a private practice office and two nursing home settings were used. Samples were taken from the hallux toenail and sent to a mycology laboratory for fluorescent potassium hydroxide (KOH) preparation and microscopic examination of a fungal culture. Of the 450 cases studied, 46.4% of the patients had a single fungal organism cultured, 30.4% had a mixed fungal infection cultured, and 23.1% had no fungal growth. Saprophytes were found in 59.9% of the 526 total fungal organisms cultured while dermatophytes were found in only 23.8%. The results of this investigation demonstrate that there may be a shift from isolated dermatophyte infection to mixed saprophyte infections in a geriatric population with onychomycosis. (J Am Podiatr Med Assoc 91(9): 456-464, 2001)




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