Pityriasis versicolor

Gupta, Aditya K.; Bluhm, Robyn; Summerbell, Richard C.

doi:10.1046/j.1468-3083.2002.00378.x

Cited by 144 publications

(201 citation statements)

References 190 publications

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confidence: 99%

“…The lesions have a characteristic flaking appearance, although in larger lesions this can be evident only at the border of the macule, and can be hypopigmented or hyperpigmented. Generally, the lesions take the form of round or oval macules or papules, although in advanced cases the lesions may become confluent (13,21,33 Temperature conditions such as growth at 37ºC and production of enzymes, including lipases, phospholipases and proteases are associated with pathogenicity (10,28,39).…”

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Identification and pathogenicity of Malassezia species isolated from human healthy skin and with macules

Neves¹,

Magalhães²,

Silva³

et al. 2005

Braz. J. Microbiol.

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This study investigated the ocurrence of Malassezia species in clinically healthy students and with macules with a slight fawn discoloration and characterized the isolates as to the pathogenicity factors such as growth at 37ºC, lipase, phospholipase and protease detection. Clinical samples were collected from different body sites of one hundred students of different ages and both sexes. The samples, obtained by scrapping the skin surface and the scalp, were treated with potassa and cultured. Cultures were obtained in Petri dishes containing Sabouraud agar medium added of olive oil, incubated at room temperature and at 37ºC. Culture identifications were based in their morphological and physiological properties. Lipase, phospholipase and protease detection was performed in specific media on Petri dishes for formation of a zone. Globose, spherical yeast cells and hypha were investigated by direct microscopy of clinical materials. Malassezia furfur was detected in seven samples and M. sympodialis in four. All Malassezia cultures presented lipase activity, but none was phospholipase positive. Protease activity was observed in two M. furfur and two M. simpodialis isolates. Key words: Malassezia furfur, M. simpodialis, pathogenicityMalassezia is a lipophilic yeast frequently found in normal human skin. Current evidence indicates a high rate of skin colonization in healthy adults, in contrast with the low rate of colonization in prepubertal children (20).Gueho et al. (11) (14,17,35,38). With the exception of M. pachidermatis, the remaining eight species have an absolute in vitro requirement for suplementation of long-chain fatty acids. Based on studies conducted within the last 5 years, it appears that the most frequently organism associated with pityriasis versicolor may not be M. furfur and possible candidates include M. globosa (2,27) and M. sympodialis (15). The genus Malassezia was recently revised, but the clinical significance of each of these species is not clearly understood (15).Pityriasis versicolor (tinea versicolor) is a superficial fungal infection of the skin, appearing most commonly on the upper trunk, as well as on the upper arms, neck and face. As suggested by its name, pityriasis versicolor may be manifested in different colours, ranging from pink or to dark brown or even black. The lesions have a characteristic flaking appearance, although in larger lesions this can be evident only at the border of the macule, and can be hypopigmented or hyperpigmented. Generally, the lesions take the form of round or oval macules or papules, although in advanced cases the lesions may become confluent (13,21,33).

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confidence: 99%

Identification and pathogenicity of Malassezia species isolated from human healthy skin and with macules

Neves¹,

Magalhães²,

Silva³

et al. 2005

Braz. J. Microbiol.

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“…Confirmation of the diagnosis of Pityriasis versicolor was done by collecting the skin scrapings from the skin lesions of patients with Pityriasis versicolor and finding both the yeast form (large number of variable size of spores producing grape-like clusters of yeast) and mycelial form (short, thick hyphae) of the Malassezia fungi producing the characteristic Spaghetti and meat-balls appearance 8 in 10% KOH mount preparation, which was examined under the microscope. Patients with Pityriasis versicolor skin lesions who were already undergoing antifungal treatment either topically or systemically and pregnant women were excluded from this study.…”

Section: Methodsmentioning

confidence: 99%

“…The clinical assessment of all the patients in both the groups was done by noting the characteristic clinical features of the Pityriasis versicolor skin lesions like the presence of hypo or hyperpigmented macules or patches covered by tiny dust like scales with irregular margins 2 and their distribution on the body over the chest, back, face, neck, upper extremities and abdomen ( Figure 1) along with the clinical examination to determine the presence of any other dermatological diseases and systemic diseases in these patients. The mycological assessment of all the patients in both the groups was done in which skin scrapings were collected from the skin lesions to prepare for 10% KOH mount, 8 which was examined under the microscope to note the findings as KOH mount positive or negative for Malassezia fungi (Figure 2). At the end of this study, i.e.…”

Section: Methodsmentioning

confidence: 99%

A Study of Comparative Assessment of the Therapeutic Efficacy of Topical Luliconazole Versus Topical Ketoconazole in the Treatment of Pityriasis Versicolor

Kumar¹

2018

jebmh

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BACKGROUNDPityriasis versicolor is one of the most common and recurring superficial fungal infections of the skin occurring in the patients attending the Dermatology Outpatient Department. Malassezia species are the causative organisms for the Pityriasis versicolor. Many different modalities of treatment are available to treat Pityriasis versicolor.The aim of the present study is to evaluate the drug, which is more therapeutically efficacious among topical luliconazole 1% cream versus topical ketoconazole 2% cream in the treatment of Pityriasis versicolor.

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“…Infection often occurs in adolescents when the sebaceous glands are active. Malassezia, an organism restricted to invading the stratum corneum (20), causes the infection (21). Antifungal preparations can be effective, but recurrences are common (22).…”

Section: Pityriasis Versicolormentioning

confidence: 99%

Antifungal agents for common outpatient paediatric infections

Bortolussi¹,

Martin²

2007

Paediatrics &Amp; Child Health

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Pityriasis versicolor

Abstract: At the conclusion of this learning activity, participants should be aware of the role of Malassezia in the development of pityriasis versicolor, the clinical and histological changes arising from this dermatosis, and the diagnosis and treatment of this disorder.

Cited by 144 publications

References 190 publications

Identification and pathogenicity of Malassezia species isolated from human healthy skin and with macules

Identification and pathogenicity of Malassezia species isolated from human healthy skin and with macules

A Study of Comparative Assessment of the Therapeutic Efficacy of Topical Luliconazole Versus Topical Ketoconazole in the Treatment of Pityriasis Versicolor

Antifungal agents for common outpatient paediatric infections

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