title: [Prevalence of Malassezia species associated with seborrheic dermatitis lesions in patients in Argentina].
abstract: BACKGROUND
  Seborrheic dermatitis (SD) is considered the second most frequently dermatosis associated with the genus Malassezia but little is the knowledge about the epidemiology of this association.
  
  
  OBJECTIVE
  To determinate the prevalence of Malassezia species associated with SD and to analyse their distribution according to the location of the lesion on the body.
  
  
  METHODS
  This study was performed in Resistencia city, located in a subtropical area in northeast Argentina. In this study, 226 skin samples from patients with lesions compatible with SD were studied. Age, gender and body sites lesion were recorded. Strains were identified by PCR-RFLP.
  
  
  RESULTS
  One hundred and thirty-one positive cultures were obtained. Association of 2 species was detected in 10 cases; therefore, 141 strains were isolated. Malasezzia globosa (43.3%) was the most frequent species isolated, followed by Malasezzia furfur (20.6%), Malasezzia sympodialis (17%) and Malasezzia restricta (16.3%). Three isolates of Malasezzia slooffiae (2.1%) and one of Malasezzia pachydermatis (0.7%) were obtained. Statistical significance (P<0.05) was found between M. globosa and scalp. Malasezzia restricta was isolated only in head areas.
  
  
  CONCLUSIONS
  This study suggests M. globosa is the most related species to SD. The prevalence of other species is different from that reported by other authors. Only M. globosa and M. restricta presented a pattern of relationship with the body sites of the lesions. It is noteworthy is the isolation of the zoophylic species M. pachydermatis. The Malassezia genus ecology and the pathogenic role of its species are still under study. This work is a contribution to this knowledge.
authors.affiliation: Departamento de Micología, Instituto de Medicina Regional, Universidad Nacional del Nordeste, Resistencia, Chaco, Argentina.
authors.forename: María de los Angeles
authors.initials: Mde L
authors.lastname: Sosa
authors.forename: Florencia
authors.initials: F
authors.lastname: Rojas
authors.forename: Magdalena
authors.initials: M
authors.lastname: Mangiaterra
authors.forename: Gustavo
authors.initials: G
authors.lastname: Giusiano
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D001118:Argentina / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D012628:Dermatitis, Seborrheic / Q000453:epidemiology / Q000382:microbiology*; D005148:Facial Dermatoses / Q000453:epidemiology / Q000382:microbiology; D005260:Female; D006801:Humans; D008290:Malassezia / Q000145:classification / Q000302:isolation & purification*; D008297:Male; D008875:Middle Aged; D009928:Organ Specificity; D015995:Prevalence; D012536:Scalp Dermatoses / Q000453:epidemiology / Q000382:microbiology; D017678:Sex Distribution; D055815:Young Adult
keywords: Dermatitis seborreica; Especies de Malassezia; Malassezia species; PCR-RFLP; Seborrheic dermatitis