Malassezia


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Malassezia

 [mal″ah-se´ze-ah]
a genus of yeastlike fungi. M. fur´fur is a species normally found on normal skin but capable of causing tinea versicolor in susceptible hosts. Called also Pityrosporon.

Malassezia

(mal'ă-sēz'ē-ă),
A genus of fungi (family Cryptococcaceae) of low pathogenicity that lack the ability to synthesize medium-chain and long-chain fatty acids and require an exogenous supply of these lipids for growth such as can be found in the skin.
[L. C. Malassez]

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.

Ma·las·se·zi·a

(mal'-ă-sē'zē-ă)
A genus of fungi (family Cryptococcaceae) of low pathogenicity that lack the ability to synthesize medium-chain and long-chain fatty acids and require for growth an exogenous supply of these lipids such as can be found in the skin.
[L. C. Malassez]

Malassez,

Louis Charles, French physiologist, 1842-1910.
Malassez disease - testicular cyst.
Malassez epithelial rests - epithelial remains of Hertwig root sheath in the periodontal ligament.
Malassezia - a genus of fungi (family Cryptococcaceae) of low pathogenicity.
References in periodicals archive ?
The newer topical azoles still under trial include sertaconazole, dapaconazole and luliconazole with effectiveness against malassezia species in PV13,14 Another option that requires further work is to combine more than one topical agents and see if there is an increased efficacy.
Malassezia may induce pathological changes in hair follicles either by direct toxicity or through production of various cytokines inducing apoptosis, as a part of keratinocytes response to presence of fungus.
Symptoms: Red areas on the face, scalp and centre of the chest with greasy looking skin flakes often in the hairline, eyebrows and sides of nose Diagnosis: Seborrhoeic dermatitis Cause: An overgrowth of yeast called malassezia that lives on the skin, or an overreaction by the skin's immune system to this yeast.
A deep skin scraping and impression smear examination was performed, which was positive for Demodex spp of mite and Malassezia yeast cells respectively.
aureus and Streptococcus pyogenes ), viruses (human papillomavirus and endogenous retroviruses), and fungi ( Malassezia and Candida albicans ).[33] Alekseyenko et al .
The prevailing theory of the past was that CARP was an abnormal host response to the fungus Malassezia furfur.
El hongo Malassezia suele ser un germen de la flora microbiana natural de nuestra piel, el cual depende de la grasa para sobrevivir.
Entre las levaduras reportadas se encuentran las pertenecientes a los generos Malassezia y Candida.
Basidiomycete yeasts of the genus Malassezia are lipophilic, unipolar, and budding yeasts characterized by a thick cell wall with high lipid content, an incomplete fatty acid synthesis metabolic pathway, and dependence on a variety of extracellular enzymes such as lipases, phospholipases, and acid sphingomyelinases for survival.
The main sweat antigen is MGL_1304, produced as a minor immunological antigen of Malassezia globosa with posttranslational modification, cleaved, and secreted as a 17 kDa major histamine-releasing sweat (Malassezia) antigen [9].