Pityrosporum

(pit'i-ros'pō-rŭm, pit'i-rō-spō'rŭm),

A genus of fungi of disputed pathogenicity found in dandruff and seborrheic dermatitis.

[G. pityron, bran, + sporos, seed]

Farlex Partner Medical Dictionary © Farlex 2012

Malassezia

A genus of fungi with 10 known species of lipophilic organisms of the class Exobasidiomycetes, which do not form mycelia. It is a normal skin saprobe which, in the face of immunocompromise in the host, causes opportunistic infections. Malassezia globosa is the most aggressive, and has been causally linked to dandruff, seborrhoeic dermatitis, and the skin rash of tinea versicolor (pityriasis versicolor).

Malassezia species
• M dermatis.
• M furfur.
• M globosa.
• M nana.
• M obtusa.
• M pachydermatis.
• M restricta.
• M slooffiae.
• M sympodialis.
• M yamatoensis.

M globosa and M restricta are the common causes of clinical disease.

Management
Selenium disulfide, ketoconazole shampoos, ciclopirox olamine, coal tar, zinc pyrithione, miconazole, or tea tree oil.

Pit·y·ros·po·rum

(pit'i-rō-spō'rŭm)

A genus of fungi found in dandruff and seborrheic dermatitis.

[G. pityron, bran, + sporos, seed]

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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References in periodicals archive ?

Hagdrup, "Splendore-Hoeppli phenomenon in Pityrosporum folliculitis (pseudoactinomycosis of the skin)," Journal of Cutaneous Pathology,vol.

Subcutaneous Granulomatous Inflammation due to Basidiobolomycosis: Case Reports of 3 Patients in Buruli Ulcer Endemic Areas in Benin

Presence of neutrophilic infiltrate is observed in Pityrosporum folliculitis.

Clinical and histopathological study of Pruritic Papular Eruptions in HIV patients at a tertiary care centre

A fungus (yeast) infection with pityrosporum ovale called tinea versicolor, which interferes with skin pigmentation.

Why is my skin discoloured?

Seborrheic dermatitis (SD) is a chronic dermatitis caused by Malassezia yeast species, including Malassezia (Pityrosporum ovale).

Adolescent with rash on face and scalp: what was causing a hypopigmented, slightly scaly facial rash and dandruff in this otherwise healthy teenager?

Malassezia pachydermatitis (formely Pityrosporum canis) is a monopolar commensal, lipophylic, basi diomycetous yeast in ellipsoidal shape with a thick wall.

A clinico-microbiological and in-vitro sensitivity study of canine Malassezia pachydermatitis

(13) Any type of specific bacterial growth is not determined in dacryoliths but fungal colonization (Candida, Pityrosporum spp.

Lacrimal sac dacryoliths-pathogenesis and composition/Lakrimal kese dakriolitleri-patogenez ve bilesim

Quantitative variations in distribution of Pityrosporum orbiculare on clinically normal skin.

Identification of different malassezia species isolated from skin of healthy dog owners in Tabriz, Iran (2010-2011)

The most common conditions to consider in the differential diagnosis (Table 1) are angiofibromas, keratosis pilaris, milia, miliaria, flat warts, molluscum contagiosum, pityrosporum folliculitis, and periorificial dermatitis.

The acne continuum: an age-based approach to therapy

Malassezia species are commensal microbiota of the skin of humans and animals but are known to cause disease, such as tinea (pityriasis) versicolor and pityrosporum folliculitis.