title: Epidemiologic Analysis of Onychomycosis in the San Diego Pediatric Population.
abstract: BACKGROUND
  Onychomycosis (OM) is thought to be a rare disease in children, although there are few epidemiologic studies.
  
  
  METHODS
  This 3-year retrospective case series of nearly 400 children seen at Rady Children's Hospital-San Diego (RCHSD) describes the characteristics of OM found in this pediatric population.
  
  
  RESULTS
  From 2011 to 2013, the Pediatric and Adolescent Dermatology Clinic at RCHSD saw a total of 36,634 unique patients, of whom 433 were unique patients with OM. Thirty-four patients met exclusion criteria, leaving 399 (1.1%) with a diagnosis of OM by a pediatric dermatologist. Nail cultures were obtained in 242 cases (60.7%), 116 (48.0%) of which were positive. Trichophyton rubrum was the most commonly isolated pathogen, responsible for 106 cases (91.3%) of positive cultures in the cohort.
  
  
  CONCLUSIONS
  Our study provides important regional information regarding epidemiologic data in pediatric onychomycosis, highlighting the diagnostic methods most commonly used and the pathogens most frequently encountered in our practice.
authors.affiliation: Department of Dermatology, State University of New York Downstate Medical Center, Brooklyn, New York.
authors.forename: Christine R
authors.initials: CR
authors.lastname: Totri
authors.affiliation: Department of Dermatology, University of California, Davis, Davis, California.
authors.forename: Stephanie
authors.initials: S
authors.lastname: Feldstein
authors.affiliation: Department of Dermatology, University of California, San Diego, La Jolla, California.
authors.forename: Shehla
authors.initials: S
authors.lastname: Admani
authors.affiliation: Department of Dermatology, University of California, San Diego, La Jolla, California.|Pediatric and Adolescent Dermatology, Rady Children's Hospital, University of California, San Diego, La Jolla, California.
authors.forename: Sheila F
authors.initials: SF
authors.lastname: Friedlander
authors.affiliation: Department of Dermatology, University of California, San Diego, La Jolla, California.|Pediatric and Adolescent Dermatology, Rady Children's Hospital, University of California, San Diego, La Jolla, California.
authors.forename: Lawrence F
authors.initials: LF
authors.lastname: Eichenfield
mesh_terms: D000293:Adolescent; D002140:California / Q000453:epidemiology; D002648:Child; D005260:Female; D006776:Hospitals, Pediatric; D006801:Humans; D007223:Infant; D008297:Male; D009262:Nails / Q000382:microbiology*; D014009:Onychomycosis / Q000453:epidemiology*; D012189:Retrospective Studies; D014249:Trichophyton / Q000302:isolation & purification*