从PV患者中分离出的马拉塞西亚表现出耐药性特征,支持其致病性质
Bharati Naik1, Jayaprakash Sasikumar1, Manjunath Shenoy2
1Cell Biology and Molecular Genetics, Yenepoya Research Centre (YRC), Yenepoya (Deemed to be University), Mangalore, 575018, India.
Archives of microbiology
|February 19, 2026
概括
与实验室菌株相比,临床Malassezia毛皮菌株的病原性和耐药性特征增加. 生物膜形成和环境耐受性中的这些适应性可能解释了持续的白色疹感染.
科学领域:
- 医学真菌学 医学真菌学
- 皮肤病学 皮肤病学
- 微生物病原体的产生
背景情况:
- 马拉塞西亚酵母是常见的皮肤共生物,但有些物种会引起皮肤病并与癌症有关.
- 触发马拉塞西亚病原性的因素尚不清楚,特别是在临床隔离物方面.
- 在已识别的21种马拉塞西亚物种中,有14种与人类有关,这突显了它们之间重要的相互作用.
研究的目的:
- 调查临床马拉西亚毛皮菌株与标准实验室菌株之间的病原性相关元素和耐药性特征的差异.
- 为了比较从pityriasis versicolor (PV) 患者中分离出的M. furfur的毒性因子和环境弹性,与参考菌株进行比较.
主要方法:
- 隔离和培养的M.furfur来自58名pityriasis versicolor患者的皮肤皮.
- 选择了六种具有明显病原性特征的临床菌株,用于与标准菌株 (MTCC1374/CBS1878) 的比较分析.
- 评估了生长动力学,生物膜形成,脂酶产生以及对温度,pH值和盐度的耐受性.
主要成果:
- 与标准菌株相比,临床M.furfur变种的生物膜形成和脂酶产生显著增加.
- 临床分离物体对pH,盐度和温度的变化表现出更强的耐受性,这表明它们在恶劣环境中具有弹性.
- 这些改变的特征表明病原性潜力增加和更好地适应人类皮肤微环境.
结论:
- 与实验室菌株相比,临床Malassezia毛皮菌株具有增强的毒性和耐药性.
- 临床隔离物体中生物膜的形成和环境耐受性的增加可能解释了白色皮病和其他与马拉塞西亚相关的疾病中持续的殖民和复发性感染.
- 了解这些进化的耐药性特征对于解决与马拉塞西亚有关的感染的治疗挑战至关重要.
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