Yeast, Pityrosporum ovale

It is now generally recognised to be associated with the presence of high levels of the yeast Pityrosporum ovale, although it has not been determined conclusively whether the yeast is the cause of the condition or merely encouraged by the abundance of nutrients from shed skin cells. 

Seborrheic dermatitis, resulting from an excess production of sebum and overgrowth of the commensal yeast Pityrosporum ovale,improves rapidly but only temporarily after the application of TCA peels. Follow-up treatment after the peels consists simply of applying vinegar every morning before showering (for the antiseptic qualities of the acetic acid) and the use of antimycotic creams. In some cases, the reaction of the yeast and metabolites causes eczema, which can be treated with topical corticosteroids. It should be noted that Easy Phytic ... 

For example, the yeast Pityrosporum ovale, the major scalp resident, is able to metabolize lipid substrates to 4-hydroxy-aclds which readily undergo ring closure to the volatile and odorous Y lactones. The technique of headspace concentration on Tenax followed by gas chromatographic/mass spectrometric analysis has been used to profile all the volatiles produced by Pityrosporum (Figure 1). These compounds Include isopentanol, benzyl... 

Acne itself is a disorder of the pilosebaceous follicles and these follicles as well as the adjacent skin surface are well populated with micro-organisms. Three micro-organisms have been implicated in 2icnc - Propionibacterium acnes, Staphylococci spp. and Pityrosporum ovale-With the former being the most important. However, micrococci, sarcina and yeasts are also present and a change in their population may predispose the patient to acne (Holland and Cunliffe, 1979). 

Pityrosporum (3) none (these yeasts are difficult to cultivate) isolated from mammals require lipids spherical or oval cells with monopolar budding not filamentous 61... 

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