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Study of the distribution of Malassezia species in patients with pityriasis versicolor and healthy individuals in Tehran, Iran.
BMC Dermatol. 2004 May 01; 4:5.BD

Abstract

BACKGROUND

Pityriasis versicolor is a superficial infection of the stratum corneum which caused by a group of yeasts formerly named pityrosporium. The taxonomy of these lipophilic yeasts has recently been modified and includes seven species referred as Malassezia. The aim of this study is to compare the distribution of Malassezia species isolated from pityriasis versicolor lesions and those isolated from healthy skins.

METHODS

Differentiation of all malassezia species performed using morphological features and physiological test including catalase reaction, Tween assimilation test and splitting of esculin.

RESULTS

In pityriasis versicolor lesions, the most frequently isolated species was M. globosa (53.3%), followed by M. furfur (25.3%), M. sympodialis(9.3%), M. obtusa (8.1%) and M. slooffiae (4.0%). The most frequently isolated species in the skin of healthy individuals were M. globosa, M. sympodialis, M. furfur, M. sloofiae and M. restricta which respectively made up 41.7%, 25.0%, 23.3%, 6.7% and 3.3% of the isolated species.

CONCLUSIONS

According to our data, M. globosa was the most prevalent species in the skin of healthy individuals which recovered only in the yeast form. However, the Mycelial form of M. globosa was isolated as the dominant species from pityriasis versicolor lesions. Therefore, the role of predisposing factors in the conversion of this yeast to mycelium and its subsequent involvement in pityriasis versicolor pathogenicity should be considered.

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Authors+Show Affiliations

Tarazooie B
Department of Medical Mycology & Parasitology, School of Public Health and Institute of Public Health Research, Tehran University of Medical Sciences, Tehran, Iran. btarazooie@razi.tums.ac.ir
Kordbacheh P
No affiliation info available
Zaini F
No affiliation info available
Zomorodian K
No affiliation info available
Saadat F
No affiliation info available
Zeraati H
No affiliation info available
Hallaji Z
No affiliation info available
Rezaie S
No affiliation info available

MeSH

AdultAge DistributionCase-Control StudiesComorbidityDiabetes MellitusFemaleHumansHyperhidrosisHypersensitivityIranMalasseziaMalePrevalenceReference ValuesSex DistributionSkinSpecies SpecificityTinea Versicolor

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15119958

Citation

Tarazooie, Bita, et al. "Study of the Distribution of Malassezia Species in Patients With Pityriasis Versicolor and Healthy Individuals in Tehran, Iran." BMC Dermatology, vol. 4, 2004, p. 5.
Tarazooie B, Kordbacheh P, Zaini F, et al. Study of the distribution of Malassezia species in patients with pityriasis versicolor and healthy individuals in Tehran, Iran. BMC Dermatol. 2004;4:5.
Tarazooie, B., Kordbacheh, P., Zaini, F., Zomorodian, K., Saadat, F., Zeraati, H., Hallaji, Z., & Rezaie, S. (2004). Study of the distribution of Malassezia species in patients with pityriasis versicolor and healthy individuals in Tehran, Iran. BMC Dermatology, 4, 5.
Tarazooie B, et al. Study of the Distribution of Malassezia Species in Patients With Pityriasis Versicolor and Healthy Individuals in Tehran, Iran. BMC Dermatol. 2004 May 1;4:5. PubMed PMID: 15119958.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Study of the distribution of Malassezia species in patients with pityriasis versicolor and healthy individuals in Tehran, Iran. AU - Tarazooie,Bita, AU - Kordbacheh,Parivash, AU - Zaini,Farideh, AU - Zomorodian,Kamiar, AU - Saadat,Farshid, AU - Zeraati,Hojjat, AU - Hallaji,Zahra, AU - Rezaie,Sassan, Y1 - 2004/05/01/ PY - 2003/12/17/received PY - 2004/05/01/accepted PY - 2004/5/4/pubmed PY - 2004/8/17/medline PY - 2004/5/4/entrez SP - 5 EP - 5 JF - BMC dermatology JO - BMC Dermatol VL - 4 N2 - BACKGROUND: Pityriasis versicolor is a superficial infection of the stratum corneum which caused by a group of yeasts formerly named pityrosporium. The taxonomy of these lipophilic yeasts has recently been modified and includes seven species referred as Malassezia. The aim of this study is to compare the distribution of Malassezia species isolated from pityriasis versicolor lesions and those isolated from healthy skins. METHODS: Differentiation of all malassezia species performed using morphological features and physiological test including catalase reaction, Tween assimilation test and splitting of esculin. RESULTS: In pityriasis versicolor lesions, the most frequently isolated species was M. globosa (53.3%), followed by M. furfur (25.3%), M. sympodialis(9.3%), M. obtusa (8.1%) and M. slooffiae (4.0%). The most frequently isolated species in the skin of healthy individuals were M. globosa, M. sympodialis, M. furfur, M. sloofiae and M. restricta which respectively made up 41.7%, 25.0%, 23.3%, 6.7% and 3.3% of the isolated species. CONCLUSIONS: According to our data, M. globosa was the most prevalent species in the skin of healthy individuals which recovered only in the yeast form. However, the Mycelial form of M. globosa was isolated as the dominant species from pityriasis versicolor lesions. Therefore, the role of predisposing factors in the conversion of this yeast to mycelium and its subsequent involvement in pityriasis versicolor pathogenicity should be considered. SN - 1471-5945 UR - https://www.unboundmedicine.com/medline/citation/15119958/Study_of_the_distribution_of_Malassezia_species_in_patients_with_pityriasis_versicolor_and_healthy_individuals_in_Tehran_Iran_ DB - PRIME DP - Unbound Medicine ER -