<i>Pityrosporum ovalis</i>
            as a Causative Agent of Seborrheic Dermatitis

Moore, Morris; Kile, Roy L.

doi:10.1126/science.81.2098.277

Cited by 9 publications

(4 citation statements)

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“…In 1853, Robin denominated it Microsporum furfur and in 1874 Malassez described this fungus in flakes taken from the scalp. 3,48 The genus Malassezia was first described by Baillon in 1889 and has taxomonic priority over the genus Pityrosporum used by Sabouraud in 1904 to refer to the same group of microorganisms. The current classification includes the genus Malassezia, which belongs to the family Cryptococcaceae of the class Basidiomycetes.…”

Section: Malassezia Sppmentioning

confidence: 99%

“…directly to the disease. 48 Malassezia spp. is associated both with infec- [51][52][53] Each one of these diseases has various clinical and histological manifestations that cannot be explained by the mere presence of a certain species of Malassezia on the skin, with contributing factors including the individual's immunological and genetic profile.…”

Section: Malassezia Sppmentioning

confidence: 99%

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Dermatite seborreica

Sampaio

Mameri²,

Vargas

et al. 2011

An. Bras. Dermatol.

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Seborrheic dermatitis is a chronic relapsing erythematous scaly skin disease, the prevalence of which is around 1 to 3% of the general population in the United States. It has two incidence peaks, the first in the first three months of life and the second beginning at puberty and reaching its apex at 40 to 60 years of age. The prevalence of seborrheic dermatitis is higher in HIV-positive individuals and the condition tends to be more intense and refractory to treatment in these patients. Neurological disorders and other chronic diseases are also associated with the onset of seborrheic dermatitis. The currently accepted theory on the pathogenesis of this disease advocates that yeast of Malassezia spp., present on the skin surface of susceptible individuals, leads to a non-immunogenic irritation due to the production of unsaturated fatty acids deposited on the skin surface. This article provides a review of the literature on seborrheic dermatitis, focusing on immunogenetics, the clinical forms of the disease and its treatment. . Keywords: Dermatitis; Dermatitis, seborrheic; Eczema Resumo: A dermatite seborreica é uma doença eritêmato-escamativa de caráter crônico-recidivante que acomete entre 1 e 3% da população geral dos Estados Unidos. Possui dois picos de incidência -o primeiro, durante os três primeiros meses de vida, e o segundo, a partir da puberdade, atingindo seu ápice entre os 40 e 60 anos de idade. Os indivíduos HIV positivos têm maior prevalência da doença, que apresenta maior intensidade e tendência à refratariedade ao tratamento. Doenças neurológicas e outras doenças crônicas também estão associadas ao desenvolvimento da dermatite seborreica. Como mecanismo fisiopatogênico, reconhece-se que o fungo Malassezia sp., presente na pele de indivíduos suscetíveis, leve a uma irritação não-imunogênica a partir da produção de metabólitos à base de áci-dos graxos insaturados deixados na superfície cutânea. Este artigo faz uma revisão da literatura sobre dermatite seborreica, com ênfase nos aspectos imunogenéticos, formas clínicas e tratamento.

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Section: Malassezia Sppmentioning

confidence: 99%

Section: Malassezia Sppmentioning

confidence: 99%

Dermatite seborreica

Sampaio

Mameri²,

Vargas

et al. 2011

An. Bras. Dermatol.

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“…There are several mechanisms by which selenium sulfide is effective in treatment of seborrheic dermatitis and tinea versicolor. Malassezia ( Pityrosporum ) species, which are lipophilic yeasts that colonize the oily or seborrheic areas of human skin, have been implicated in these disease processes (12,13). Selenium sulfide has fungicidal activity to Pityrosporum ovale in vitro (14–16).…”

Section: Discussionmentioning

confidence: 99%

Scalp Discoloration from Selenium Sulfide Shampoo: A Case Series and Review of the Literature

Gilbertson

Jarrett

Bayliss

et al. 2011

Pediatric Dermatology

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We describe six patients who developed orange to red-brown scalp discoloration after application of selenium sulfide-containing shampoos. This phenomenon has been described only once previously. In all of the cases, the discoloration resolved shortly after discontinuing the selenium sulfide. Lightly swabbing with isopropyl alcohol facilitated removal of the discoloration. This simple technique serves as a painless diagnostic method, which may prevent unnecessary evaluation with a biopsy.

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“…initiate an inflammatory response and cause epidermal hyperproliferation. [17][18][19] Psoriasis vulgaris is a T-cell-mediated chronic inflammatory skin disorder that frequently affects the scalp. In recent years, it has been suggested that dysbiosis of the skin microbiota may be associated with this condition.…”

Section: Introductionmentioning

confidence: 99%

Is cutaneous microbiota a player in disease pathogenesis? Comparison of cutaneous microbiota in psoriasis and seborrheic dermatitis with scalp involvement

Kayıran¹,

Sahin

Koçoğlu

et al. 2022

IJDVL

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Background: Knowledge about cutaneous microbiota in psoriasis vulgaris and seborrheic dermatitis is limited, and a comparison of microbiota in the two diseases was not yet previously undertaken. Aims/Objectives: This study aimed to compare the scalp lesional and non-lesional microbiota in psoriasis vulgaris and seborrheic dermatitis with that in a healthy control group. Methods: Fifty samples were taken with sterile swabs from patients’ and controls’ scalps, and 16S rRNA gene sequencing analyses were performed. Results: Alpha and beta diversity analyses showed that bacterial load and diversity were significantly increased in psoriasis vulgaris and seborrheic dermatitis lesions compared to the controls. As phyla, Actinobacteria decreased and Firmicutes increased, while as genera, Propionibacterium decreased; Staphylococcus, Streptococcus, Aquabacterium, Neisseria and Azospirillum increased in lesions of both diseases. Specifically, Mycobacterium, Finegoldia, Haemophilus and Ezakiella increased in psoriasis vulgaris and Enhydrobacter, Micromonospora and Leptotrichia increased in seborrheic dermatitis lesions. Mycobacterium, Ezakiella and Peptoniphilus density were higher in psoriasis vulgaris compared to seborrheic dermatitis lesions. The bacterial diversity and load values of non-lesional scalp in psoriasis vulgaris and seborrheic dermatitis lay between those of lesional areas and controls. Limitations: The small sample size is the main limitation of this study. Conclusion: Higher bacterial diversity was detected in lesions of both psoriasis and seborrheic dermatitis compared to the controls, but similar alterations were observed when the two diseases were compared. Although these differences could be a result rather than a cause of the two diseases, there is a need to analyze all members of the microbiota and microbiota-host interactions.

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Pityrosporum ovalis as a Causative Agent of Seborrheic Dermatitis

Cited by 9 publications

References 0 publications

Dermatite seborreica

Dermatite seborreica

Scalp Discoloration from Selenium Sulfide Shampoo: A Case Series and Review of the Literature

Is cutaneous microbiota a player in disease pathogenesis? Comparison of cutaneous microbiota in psoriasis and seborrheic dermatitis with scalp involvement

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