Especies de Malassezia causantes de pitiriasis versicolor en Paraguay

FARIÑA-GONZÁLEZ, NORMA; ACOSTA, ROMINA; SAMUDIO, MARGARITA; ADAMA, ARNALDO; BOLLA, LOURDES; FIGUEREDO, LADIS; GIUSIANO, GUSTAVO

REVISTA CHILENA DE INFECTOLOGíA

SOC CHILENA INFECTOLOGIA

Año: 2019 vol. 36 p. 742 - 749

0716-1018

Background: Pityriasis versicolor is a frequent pathology in Paraguay; however, its epidemiology is unknown.Aim: To determine the frequency of Malassezia species causing pityriasis versicolor and the epidemiological characteristics of the population. Methods: Samples from patients with a presumptive diagnosis of pityriasis versicolorwere collected. Laboratory diagnosis was carried out by fresh examination and culture in modified Dixon agar and chromogenic Chromagar Malassezia®, incubated at 32° C, and identification by macro and micromorphological features, biochemical and physiological tests. Results: 102 patients were included (51% female) from 1 month to 63 years of age, the predominant age group was 11-20 years (35.3%). The most frequent location was on the back (60.8%). Hipocromic clinical forms (48%) predominated. The most frequent species was M. globosa (52.9%), followed by M. furfur (24.5%), M. sympodialis (18.6%) and M. slooffiae (6.9%). Conclusions: The observed epidemiology is similar to other South American studies, with no sex distinction, predominantly hypochromicclinical form and as primary responsible species appears M. globosa. This is the first report on species causing pityriasis versicolor in Paraguay and the characteristics of the affected population