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Biology

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Microbiology

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Microbial Diversity

Firmicutes: Bacteria, Fermentation, and Spores

Description

Firmicutes are a diverse phylum of Gram-positive bacteria with low GC content in their genomes. They include both monoderm and diderm cell envelopes, which points to a complex evolutionary history. Their members show wide variation in shape, metabolism, and ecological role.

Three major orders hel...

Transcript

厚壁菌门为革兰氏阳性菌,其基因组中鸟嘌呤-胞嘧啶含量较低。该门的主要目包括乳杆菌目(Lactobacillales)、梭菌目(Clostridiales)和芽孢杆菌目(Bacillales)。

乳杆菌目包含不形成芽孢的乳酸菌。许多物种具有发酵能力,且为耐氧性厌氧菌,意味着它们可以在有氧环境中生长。

例如与乳制品相关的LactobacillusLactococcus菌种、致病性和非致病性Streptococcus菌种,以及通常来源于粪便且可能对人类具有致病性的Enterococcus菌种。

芽孢杆菌目和梭菌目包含多种具有不同特性的物种。

芽孢杆菌目(Bacillales)包括不形成芽...