Pitiríase versicolor: isolamento e identificação das principais espécies de Malassezia

Framil, Valéria Maria de Souza; Melhem, Márcia de Souza Carvalho; Szeszs, Maria Walderez; Corneta, Elaine Cristina; Zaitz, Clarisse

doi:10.1590/s0365-05962010000100021

Cited by 9 publications

(11 citation statements)

References 5 publications

(1 reference statement)

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“…11 While most studies suggest that M. globosa is a causative agent of PV, several studies showed that M. sympodialis and M. furfur were the predominant species in PV. [12][13][14][15][16] Results of the present study confirm and expand previous data. The growth rate and medium requirements substantially vary between Malassezia species, which would bias analysis.…”

Section: Discussionsupporting

confidence: 91%

“…Several reports suggested that M. sympodialis is the predominant species in healthy human skin and skin of patients with atopic dermatitis, while M. globosa was found in PV. [14][15][16] The difference in distribution of Malassezia species among studies in the results yielded by the conventional culture-based method may be attributed to the sampling technique and different culture media. 6 is known as an agent of external otitis and has been considered responsible for some cases of systemic infection in premature children.…”

Section: Discussionmentioning

confidence: 99%

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Molecular analysis of Malassezia species isolated from Israeli patients with pityriasis versicolor

2013

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Molecular analysis of Malassezia species isolated from Israeli patients with pityriasis versicolor

2013

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“…11,12,29 The different shades of injuries are related to an interference in the production of melanin caused by a fungus of the genus Malassezia . When the distribution of melanin in the skin becomes irregular, the spots appear.…”

Section: Discussionmentioning

confidence: 99%

Pityriasis versicolor: clinical-epidemiological characterization of patients in the urban area of Buerarema-BA , Brazil

Santana

Azevedo

Filho

2013

An. Bras. Dermatol.

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BACKGROUND:Pityriasis versicolor (PV) is a cutaneous pigmentation disorder caused by a lipophilic yeast of the genus Malassezia sp. It is a superficial mycosis characterized by well-defined, slightly scaly skin lesions of variable color. In Brazil, the number of reported cases is small, and there are few epidemiological studies. OBJECTIVES:to assess incidence, characteristics of the lesions, effectiveness of the Zileri's Sign procedure, and the epidemiological profile of PV in the urban area of Buerarema - Bahia. METHODS:Biological samples were collected on pre-established days at Basic Health Care Units from July to September 2010. Sample collection was followed by laboratory diagnosis using Porto's Method. RESULTS:Of the 158 patients with suspected PV participating in the study, 105 (66.5%) were positive; 72 (68.6%) were female and 33 (31.4%) were male. Sex and location of lesions showed statistically significant differences (p<0.05). The region with the highest rate of cases of PV was found to be the center of the city, with 40.9% of diagnosed cases. The most affected age group was between 10 and 19 years. There was a significant association between the results produced through Zileri's Sign and Porto's Method in relation to positive and negative results (p<0.05). CONCLUSIONS: The results showed a higher prevalence of PV among individuals at puberty. The Zileri's Sign method proved to be counterproductive, because it showed low efficacy as a method for clinical diagnosis, yielding negative results for 36 (34.3%) patients who had been diagnosed with PV through laboratory examination.

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“…However, they are in agreement with the findings of Framil et al, who also reported M. sympodialis as being the most prevalent species. 7 Relapses are often reported by patients and cases of recurrence were found for almost all the species isolated; however, the number of relapses was not significantly different between the species of fungus. Framil et al reported a predominance of M. sympodialis in patients who had experienced more relapses; nevertheless, this finding was not confirmed in the present study.…”

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confidence: 91%

Identificação de espécies de malassésia na pitiríase versicolor em um serviço de dermatologia do sul do Brasil

Petry

Tanhausen

Weiss

et al. 2011

An. Bras. Dermatol.

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Pityriasis versicolor (PV) is a disease with worldwide distribution. Twelve different species of Malassezia yeast have been described. The objective of this study was to determine which species of Malassezia are more prevalent in patients with pityriasis versicolor. Samples were collected by scraping the lesions of 87 patients with a clinical suspicion of pityriasis versicolor. The samples were then submitted to fungal microscopy and culture to identify the species. The species found were: Malassezia sympodialis (30%), Malassezia furfur (25.7%), Malassezia globosa (22.7%), Malassezia restricta (12.1%), Malassezia obtusa (7.6%) and Malassezia slooffiae (1.5%). Keywords: Dermatology; Dermatomycoses; Fungi; Mycoses. Resumo:A pitiríase versicolor é uma doença de distribuição universal. Existe a descrição de 12 espé-cies de malassezia. O objetivo deste estudo foi determinar quais as espécies de malassezia mais prevalentes nos pacientes com pitiríase versicolor. Foram realizadas as coletas através de raspado das lesões nos pacientes com suspeita clínica de pitiríase versicolor e posterior exame micológico e cultural para identificação final da espécie. Foram coletadas amostras de 87 pacientes. Quanto às culturas, 30% foram de Malassezia sympodialis, 25,7% de Malassezia furfur, 22,7% de Malassezia globosa, 12,1% de Malassezia retrita, 7,6% de Malassezia obtusa e 1,5% de Malassezia sloofiae.

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Pitiríase versicolor: isolamento e identificação das principais espécies de Malassezia

Abstract: Resumo: As espécies do gênero Malassezia isoladas foram: Malassezia sympodialis (16,66%), Malassezia furfur (12,50%), Malassezia globosa (11,45%) e Malassezia slooffiae (2,10%). A Malassezia sympodialis foi a espécie que predominou em nosso estudo.

Cited by 9 publications

References 5 publications

Molecular analysis of Malassezia species isolated from Israeli patients with pityriasis versicolor

Molecular analysis of Malassezia species isolated from Israeli patients with pityriasis versicolor

Pityriasis versicolor: clinical-epidemiological characterization of patients in the urban area of Buerarema-BA , Brazil

Identificação de espécies de malassésia na pitiríase versicolor em um serviço de dermatologia do sul do Brasil

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