Relationship between microbial flora and skin surface conditions on healthy female subjects.

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The microbial flora of the facial skin was examined through the year for 41 healthy female subject. In order to study the relationship between microbial flora and skin surface conditions, physiological parameters (skin surface lipid, skin surface morphology and Transepidermal Water Loss) were also determined. The facial skin types were classified by skin surface lipid and skin surface morphology.The predominant microorganisms on the skin were Propionibacterium acnes as anaerobic bacteria and Staphylococcus S2, aerobic diphtheroids, micrococci as aerobic, and incidence of micrococci was increased in winter. Aerobic bacteria were clossly related to TWL and skin surface morphology and it was shown that micrococci were detected more frequently on the dry and flaky skin. In the relationship between microbial flora and skin type, it was shown that P. acnes was predominantly detected on every type skin. On the other hand Staphylococcus S2 was predominantly isolated on the "normal skin". micrococci were found on the "dry-type, oily skin" and both Staphylococcus S2 and aerobic diphtheroids were on the "oily skin", respectively. Furthermore, it was revealed that staphylococci and the supernatants of the culture fluid inhibit the growth of micrococci.From these results, it was suggested that dry and flaky skin or "dry-type, oily skin" would be improved by inhibition of growth of micrococci with staphylococci.
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