Borelli D
Mycopathologia. 1985 Mar;89(3):147-53. doi: 10.1007/BF00447023.
In a randomly collected series of 175 cases of pityriasis versicolor in residents of the central-northern part of Venezuela, 13% of the patients were infected with ovoid unicellular units of the causal fungus (Malassezia ovalis) and 87% with globous unicellular units in the scales (M. furfur). Only globous unicellular units (Pityrosporum orbiculare) were seen outside the active lesions and in these, after the successful treatment with ketoconazole. The median age of 40 'ovalis' patients was 37.5 years; the same in 40 'furfur' patients was 24.5 years. The median age at the moment of discovering the first lesions among 'ovalis' patients was 31; among 'furfur' patients this was 20 years. There were 16 male patients among the 'ovalis' and 24 among the 'furfur' groups of 40. The topographic distribution of the lesions varied according to the type of the invader. M. ovalis prevailed on the trunk below the waist-line and on the limbs, mainly on buttocks and upper legs. M. furfur prevailed on the chest, neck, face and upper limbs. The hypothesis is offered that the ovoid agent of pityriasis versicolor preferentially occupies the less sweating and sebum-producing parts of the body in older (and drier) persons than the globous type does.
在对委内瑞拉中北部居民随机收集的175例花斑癣病例中，13%的患者感染了致病性真菌（卵形马拉色菌）的卵形单细胞单位，87%的患者鳞屑中感染了球形单细胞单位（糠秕马拉色菌）。仅在活动性皮损外及酮康唑成功治疗后的皮损中可见球形单细胞单位（圆形糠秕孢子菌）。40例“卵形”患者的中位年龄为37.5岁；40例“糠秕”患者的中位年龄为24.5岁。“卵形”患者首次出现皮损时的中位年龄为31岁；“糠秕”患者为20岁。在40例“卵形”患者组中有16例男性患者，40例“糠秕”患者组中有24例男性患者。皮损的部位分布因入侵者类型而异。卵形马拉色菌在腰线以下的躯干和四肢占优势，主要在臀部和大腿上部。糠秕马拉色菌在胸部、颈部、面部和上肢占优势。有人提出这样的假说：与球形类型相比，花斑癣的卵形病原体在年龄较大（且较干燥）的人群中更倾向于占据身体出汗较少和皮脂分泌较少的部位。
