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首页> 外文期刊>Infection and immunity >Surface-Surface Associations in Microbial Communities Populating Epithelial Habitats in the Murine Gastrointestinal Ecosystem: Scanning Electron Microscopy
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Surface-Surface Associations in Microbial Communities Populating Epithelial Habitats in the Murine Gastrointestinal Ecosystem: Scanning Electron Microscopy

机译：在小鼠胃肠道生态系统中上皮栖息地的微生物群落中的表面-表面关联：扫描电子显微镜。

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Scanning electron microscopy has been used to visualize the residents of microbial communities populating habitats on epithelial surfaces in the gastrointestinal tracts of mice. In the stomach, bacteria form a dense layer on the stratified squamous epithelium of the nonsecreting area. Microbes of at least three morphological types can be seen in this layer, including short rods with round ends, rods in chains, and tapering filaments composed of repeating units of rod- or coccal-shaped elements varying in size from large at one end of the filament to small at the other end. These three forms all attach by one end to the epithelium. The latter two forms can be found only so attached; in both cases, the end is inserted into a hole or depression in the keratinized epithelium. In the small intestine, a microbe of morphology similar to that of the tapering filaments found in the stomach can be seen attached end-on to the epithelium. Again each filament has one end inserted into a hole in the epithelium. In this case, however, the repeating elements of each filament are all about the same size. In the cecum and colon, predominantly fusiform- and spiral-shaped microbes can be seen mixed together in layers on the epithelium. At least three types of fusiform-shaped microbes can be distinguished on the basis of surface texture, and one type of spiral-shaped microbe can be found. These microorganisms appear to be attached to each other and to the epithelium by weblike filaments. The numerous microbial types present in the various epithelial habitats associate intimately surface-to-surface with each other and with the epithelium. Such surface-surface association may be an important autogenic factor contributing to the stability of the murine gastrointestinal ecosystem.
机译：扫描电子显微镜已被用于可视化微生物群落的居民，这些微生物群落居住在小鼠胃肠道上皮表面上的栖息地。在胃中，细菌在非分泌区的分层鳞状上皮上形成致密层。在这一层中可以看到至少三种形态类型的微生物，包括带有圆端的短棒，成链的棒以及由重复的杆状或球状元素的单元组成的渐细细丝，其大小从较大的一端开始变化。在另一端变细。这三种形式都一端附着于上皮。后两种形式只能如此找到。在两种情况下，末端都插入角化上皮的孔或凹陷中。在小肠中，可以看到形态相似的微生物，其形态与胃中逐渐变细的细丝末端附着在上皮细胞上。同样，每根细丝的一端插入上皮的孔中。然而，在这种情况下，每个细丝的重复元件都具有大约相同的尺寸。在盲肠和结肠中，主要观察到梭形和螺旋形微生物在上皮的各层中混合在一起。可以根据表面质地区分至少三种梭状微生物，并且可以找到一种螺旋状微生物。这些微生物似乎通过网状细丝彼此附着并与上皮附着。存在于各种上皮栖息地中的多种微生物类型彼此之间以及与上皮紧密地表面相关联。这种表面-表面缔合可能是有助于鼠胃肠生态系统稳定性的重要自体因素。

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