Identification of Malassezia species isolated from patients with extensive forms of pityriasis versicolor in Siena, Italy

Abstract Background Pityriasis versicolor is a chronic superficial fungal infection seen worldwide, with high prevalence observed in hot and humid climates. Objectives The aim of this work was to isolate and identify Malassezia species from pityriasis versicolor using specific fast gtowth media; Chrom agar to obtain a better understanding of the role of each species in the etiology of disease. Patients and Methods This study was conducted on 70 patients with clinical diagnosis of pityriasis versicolor with positive KOH test. All of the participants were subjected to a well informed consents, full history taking including age, sex, site of the lesions and any previous treatment, full general and dermatological examination to determine site, color of the lesions and Wood's light examination. Results Our results reported 94.3% of studied patients yielded growth on culture while 5.7% did not show any growth. The predominant age group was ≥ 25 years old. Furthermore it was found that PV affected male subjects (62.90%) more than the females (37.1%). Conclusion Malassezia yeasts, although are considered a part of normal skin microbiome, is a known cause of pityriasis versicolor. PV was more common in males in the age group ≥ 25yrs. The most affected body site was the chest, the most common variant is hyperpigmented type, and the commonest isolate was M.furfur.

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CHROMOPHYTOSIS OVER THE GROIN – AN UNUSUAL PRESENTATION

10.36106/gjra/1804978 ◽

2021 ◽

pp. 60-61

Author(s):

S Suzsmi Latha ◽

Sane Roja Renuka ◽

Vignesh N R ◽

K Manoharan

Keyword(s):

Fungal Infection ◽

Clinical Features ◽

Clinical Manifestations ◽

Pityriasis Versicolor ◽

Unusual Presentation ◽

Rare Presentation ◽

Malassezia Species ◽

Tinea Versicolor

Pityriasis versicolor is also known as tinea versicolor. It is a common supercial fungal infection of the skin. Clinical features of pityriasis versicolor include either hyperpigmented or hypopigmented ne [1] scaled macules or patches. The most affected sites are the trunk, neck and proximal extremities. It rarely occurs over the groin. It is caused by yeasts of the Malassezia species, commensal of the keratinized layers of the skin which under certain conditions become pathogenic determining the clinical manifestations of the disease. We hereby report a case of Pityriasis versicolor occurring over the groin, a rare presentation.

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Distribution of Malassezia Species from Scales of Patient with Pityriasis Versicolor by Culture in Vietnam

Open Access Macedonian Journal of Medical Sciences ◽

10.3889/oamjms.2019.091 ◽

2019 ◽

Vol 7 (2) ◽

pp. 184-186 ◽

Cited By ~ 2

Author(s):

Van Tran Cam ◽

Thuong Nguyen Van ◽

Khang Tran Hau ◽

Doanh Le Huu ◽

Phuong Pham Thi Minh ◽

...

Keyword(s):

Growth Rate ◽

Detection Rate ◽

Pathogenic Fungus ◽

Treatment Method ◽

Pityriasis Versicolor ◽

Antifungal Drugs ◽

Yeast Cells ◽

Direct Examination ◽

Malassezia Species ◽

Prevalent Species

BACKGROUND: The detection of pathogenic fungus is an important step and key to assessing the sensitivity of the antifungal drugs, and therefore choosing an effective treatment method. AIM: To identify Malassezia species from scales of a patient with pityriasis versicolor. METHODS: Three hundred patients with pityriasis versicolor who were positive with direct examination, were isolated by culture. RESULTS: Identification of Malassezia species by culture: the growth rate was 90.3%; the detection rate was 97.0%, including 11 species: M. globosa (42.4%), M. dermatitis (17.3%), M. furfur (14.4%). M. globosa was the most prevalent species in the 20-29 group 36.5%, in hyphae and yeast cells (42.2%). CONCLUSION: M. globosa is the main cause of pityriasis versicolor in Vietnam.

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