title: SIXTEEN YEARS OF PITYRIASIS VERSICOLOR IN METROPOLITAN AREA OF PORTO ALEGRE, SOUTHERN BRAZIL.
abstract: Pityriasis versicolor is the most common of the diseases caused by Malassezia yeasts. The aim of this study is to determine the prevalence of pityriasis versicolor and its etiological aspects in the metropolitan area of Porto Alegre, Brazil. A retrospective cross-sectional study with data from patients of a reference hospital from 1996 to 2011 was performed. Collected data included: date, age, gender, ethnicity, anatomical region of lesion and the direct mycological examination results. Among the positive results in the direct mycological examination, 5.8% (2,239) were positive for pityriasis versicolor. The angular coefficient (B) was -0.3%/year, showing a decrease over the years. The disease was more prevalent in men (7.1% of men versus 5.1% of women that underwent the direct mycological examination); younger age (median 31 years old); "pardo" and black people (3.7% more than expected in the sample); trunk (73.44% of the affected anatomic sites). Lesions in rare sites (groin, genitals, legs, feet and hands) were also observed in this study. In conclusion, due to the decrease in the prevalence of pityriasis versicolor, long-term epidemiological studies in the metropolitan area of Porto Alegre, Brazil, are needed to continue the monitoring of this disease.
authors.affiliation: Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, BR.
authors.forename: Daiane
authors.initials: D
authors.lastname: Heidrich
authors.affiliation: Universidade Federal do Piauí, Parnaíba, PI, BR.
authors.forename: Tatiane Caroline
authors.initials: TC
authors.lastname: Daboit
authors.affiliation: Universidade Federal do Pampa, Uruguaiana, RS, BR.
authors.forename: Cheila Denise Ottonelli
authors.initials: CD
authors.lastname: Stopiglia
authors.affiliation: Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, BR.
authors.forename: Cibele Massotti
authors.initials: CM
authors.lastname: Magagnin
authors.affiliation: Santa Casa de Misericórdia de Porto Alegre, Porto Alegre, RS, BR.
authors.forename: Gerson
authors.initials: G
authors.lastname: Vetoratto
authors.affiliation: Santa Casa de Misericórdia de Porto Alegre, Porto Alegre, RS, BR.
authors.forename: Taís Guarienti
authors.initials: TG
authors.lastname: Amaro
authors.affiliation: Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, BR.
authors.forename: Maria Lúcia
authors.initials: ML
authors.lastname: Scroferneker
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001938:Brazil / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012189:Retrospective Studies; D017678:Sex Distribution; D014010:Tinea Versicolor / Q000453:epidemiology*; D014505:Urban Population; D055815:Young Adult