Department of Dermatology, Tokyo Medical University, Shinjuku, Japan.
Microbiol Immunol. 2012 Apr;56(4):238-44. doi: 10.1111/j.1348-0421.2012.00430.x.
Of the fungal skin microbiota, the lipophilic yeast genus Malassezia predominates at all body sites. Of the members of this genus, M. globosa, M. restricta, and M. sympodialis are the most common on the face, limbs, and trunk. In the present study, the Malassezia microbiotas in the external auditory canal and on the sole of the foot were characterized. M. slooffiae was the most common species in both the external auditory canal and on the sole of the foot, followed by M. restricta. Principal component analysis further revealed that the Malassezia microbiota in the external auditory canal and on the sole of the foot constitute a different cluster from those on the scalp and cheek and in the nasal cavity. Additionally, five new Malassezia phylotypes were detected on the sole of the foot and in the external auditory canal. Our results suggest that a distinctive Malassezia microbiota is present in the external auditory canal and on the sole of the foot, although the clinical significance of this finding remains unknown.
在皮肤真菌微生物群中，亲脂性酵母属马拉色菌在所有身体部位都占优势。在这个属中，M. globosa、M. restricta 和 M. sympodialis 是面部、四肢和躯干上最常见的。在本研究中，对外耳道和足底的马拉色菌微生物群进行了特征描述。M. slooffiae 是外耳道和足底最常见的物种，其次是 M. restricta。主成分分析进一步表明，外耳道和足底的马拉色菌微生物群与头皮、脸颊和鼻腔中的微生物群不同。此外，还在足底和外耳道中检测到五个新的马拉色菌菌型。我们的研究结果表明，虽然这一发现的临床意义尚不清楚，但外耳道和足底存在独特的马拉色菌微生物群。
