Postgraduation in Health and Behavior, Universidade Católica de Pelotas; Department of Dermatology, Universidade Federal de Pelotas, Pelotas, RS, Brazil.
Postgraduation in Health and Behavior, Universidade Católica de Pelotas.
An Bras Dermatol. 2024 Nov-Dec;99(6):863-868. doi: 10.1016/j.abd.2023.12.005. Epub 2024 Jul 20.
Little is known about the ultrastructure of Piedraia hortae.
To examine a P. hortae colony with scanning electron microscopy and investigate possible contributions to its the pathogenesis of black piedra.
On low magnifications, two distinct aspects of the colony are identified, a compact area and a filamentous area. Analysis of the filamentous area demonstrates hyphae adhered by a thin reticular substance. A recurring finding is the adhesion between the fungal filaments in parallel. On high magnifications, the microfibrillar substance adhering the hyphae to each other becomes very evident. Examination of the compact area shows the hyphae embedded in the reticular matrix forming a biofilm and the colony well adhered. On high magnification, it can be observed that the hyphae are within this fibrillar matrix, which has the same appearance as the filamentous substance that adheres the hyphae to each other.
Only one strain was examined.
The formation of biofilm with fungal structures and reticulated extracellular substance is important in the pathogenesis of black piedra.
关于 Piedraia hortae 的超微结构知之甚少。
用扫描电子显微镜检查 Piedraia hortae 的菌落，并探讨其对黑结石病发病机制的可能贡献。
在低倍放大下，可识别出菌落的两个不同方面，即致密区和丝状区。对丝状区的分析表明，菌丝通过薄的网状物质附着。反复出现的发现是真菌丝平行附着。在高倍放大下，附着在菌丝之间的微纤维物质变得非常明显。对致密区的检查显示，菌丝嵌入在形成生物膜的网状基质中，菌落牢固附着。在高倍放大下，可以观察到菌丝位于纤维基质内，其外观与附着菌丝的丝状物质相同。
仅检查了一个菌株。
具有真菌结构和网状细胞外物质的生物膜的形成在黑结石病的发病机制中很重要。
