Christensenella minuta (C. minuta) is a recently identified as a gram-negative bacterium belonging to the genus of Christensenella and the family of Christensenellaceae. C. minuta was first discovered in 2012 from the feces of a healthy donor. As a Gram-negative bacterium, C. minuta mainly distributes in the human gastrointestinal tract, which is a strictly anaerobic environment.
Structurally, C. minuta is a kind of non-spore-forming and non-motile bacterium with short-rod shape (approximately 0.4×0.8-1.9 µm) and a tapered end, which sometimes presents in pairs with a rounded coccobacillary shape. When cultured in Gifu anaerobic medium, circular and beige C. minuta colonies are formed with a 0.1-0.2 mm in diameter. The most optimal growth conditions of C. minuta are 37-40 ℃ in temperature and at pH 7.5.
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