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Candida auris Forms High-Burden Biofilms in Skin Niche Conditions and on Porcine Skin.
mSphere ( IF 4.8 ) Pub Date : 2020-01-22 , DOI: 10.1128/msphere.00910-19
Mark V Horton 1, 2 , Chad J Johnson 1 , John F Kernien 1 , Tarika D Patel 1 , Brandon C Lam 1 , J Z Alex Cheong 1, 2 , Jennifer J Meudt 3 , Dhanansayan Shanmuganayagam 3 , Lindsay R Kalan 1, 2 , Jeniel E Nett 2, 4
Affiliation  

Emerging pathogen Candida auris causes nosocomial outbreaks of life-threatening invasive candidiasis. It is unclear how this species colonizes skin and spreads in health care facilities. Here, we analyzed C. auris growth in synthetic sweat medium designed to mimic axillary skin conditions. We show that C. auris demonstrates a high capacity for biofilm formation in this milieu, well beyond that observed for the most commonly isolated Candida sp., Candida albicans The C. auris biofilms persist in environmental conditions expected in the hospital setting. To model C. auris skin colonization, we designed an ex vivo porcine skin model. We show that C. auris proliferates on porcine skin in multilayer biofilms. This capacity to thrive in skin niche conditions helps explain the propensity of C. auris to colonize skin, persist on medical devices, and rapidly spread in hospitals. These studies provide clinically relevant tools to further characterize this important growth modality.IMPORTANCE The emerging fungal pathogen Candida auris causes invasive infections and is spreading in hospitals worldwide. Why this species exhibits the capacity to transfer efficiently among patients is unknown. Our findings reveal that C. auris forms high-burden biofilms in conditions mimicking sweat on the skin surface. These adherent biofilm communities persist in environmental conditions expected in the hospital setting. Using a pig skin model, we show that C. auris also forms high-burden biofilm structures on the skin surface. Identification of this mode of growth sheds light on how this recently described pathogen persists in hospital settings and spreads among patients.

中文翻译:

假丝酵母在皮肤生境条件下和猪皮肤上形成高负担的生物膜。

新兴的病原体假丝酵母会导致威胁生命的侵袭性念珠菌病的医院爆发。目前尚不清楚该物种如何在皮肤上定居并在医疗机构中传播。在这里,我们分析了人工汗液在人工汗液培养基中的生长,该培养基旨在模拟腋窝皮肤状况。我们显示金黄色葡萄球菌在此环境中展示出高的生物膜形成能力,远远超过最常见的念珠菌,白色念珠菌所观察到的能力。金黄色葡萄球菌生物膜持续存在于医院环境中预期的环境条件下。为了模拟金黄色葡萄球菌的皮肤定植,我们设计了离体猪皮肤模型。我们显示在多层生物膜中的猪皮肤上增殖了金黄色葡萄球菌。这种在皮肤小生境条件下壮成长的能力有助于解释金龟子在皮肤上定植,在医疗器械上持久存在的倾向,并迅速在医院传播。这些研究为进一步表征这一重要的生长方式提供了与临床相关的工具。重要信息新兴的真菌病原体金耳假丝酵母会引起侵袭性感染,并在世界各地的医院中传播。该物种为何表现出在患者之间有效转移的能力尚不清楚。我们的发现表明,假单胞菌在模拟皮肤表面汗水的条件下会形成高负担的生物膜。这些依附的生物膜群落在医院环境中预期的环境条件下持续存在。使用猪的皮肤模型,我们表明金黄色葡萄球菌还在皮肤表面形成高负担的生物膜结构。这种生长方式的鉴定揭示了这种最近描述的病原体如何在医院环境中持续存在并在患者中传播。这些研究为进一步表征这一重要的生长方式提供了与临床相关的工具。重要信息新兴的真菌病原体金耳假丝酵母会引起侵袭性感染,并在世界各地的医院中传播。该物种为何表现出在患者之间有效转移的能力尚不清楚。我们的发现表明,假单胞菌在模拟皮肤表面汗水的条件下会形成高负担的生物膜。这些依附的生物膜群落在医院环境中预期的环境条件下持续存在。使用猪的皮肤模型,我们表明金黄色葡萄球菌还在皮肤表面形成高负担的生物膜结构。这种生长方式的鉴定揭示了这种最近描述的病原体如何在医院环境中持续存在并在患者中传播。这些研究为进一步表征这种重要的生长方式提供了与临床相关的工具。该物种为何表现出在患者之间有效转移的能力尚不清楚。我们的发现表明,假单胞菌在模拟皮肤表面汗水的条件下会形成高负担的生物膜。这些依附的生物膜群落在医院环境中预期的环境条件下持续存在。使用猪的皮肤模型,我们显示金黄色葡萄球菌还在皮肤表面形成高负担的生物膜结构。这种生长方式的鉴定揭示了这种最近描述的病原体如何在医院环境中持续存在并在患者中传播。
更新日期:2020-01-23
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