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Bacillota (synonym Firmicutes) is a phylum of bacteria, most of which have gram-positive cell wall structure. [2] The renaming of phyla such as Firmicutes in 2021 remains controversial among microbiologists, many of whom continue to use the earlier names of long standing in the literature.
Roseburia is a genus of butyrate-producing, Gram-positive anaerobic bacteria that inhabit the human colon. Named in honor of Theodor Rosebury, they are members of the phylum Bacillota (formerly known as Firmicutes). [2] [3] Increased abundance of Roseburia is associated with weight loss and reduced glucose intolerance in mice. [4]
In 1962, R.G.E. Murray proposed to divide the "kingdom" (now domain [8]) Bacteria into three divisions (= phyla) on the basis of the cell wall types: Gram-negative Gracilicutes, with a thin cell wall and little peptidoglycan; Gram-positive Firmicutes, with a thicker cell wall and more peptidoglycan (the name was later changed in "Firmicutes"), and
Christensenella is a genus of non-spore-forming, anaerobic, and nonmotile bacteria from the family Christensenellaceae. They are also part of the order Clostridiales, the class Clostridia and the phylum Firmicutes. [1] Phylogenetic analyzes of 16S rRNA gene sequences are used to describe this family.
Eubacterium eligens is a member of the Bacillota (previously Firmicutes) phylum, which is one of two phyla which constitute more than 90% of microflora in the human gut. [4] [5] Characteristics of this phylum include low GC content in the DNA and Gram-positivity. [2]
Streptococcus is a genus of gram-positive or spherical bacteria that belongs to the family Streptococcaceae, within the order Lactobacillales (lactic acid bacteria), in the phylum Bacillota. [2] Cell division in streptococci occurs along a single axis , thus when growing they tend to form pairs or chains, which may appear bent or twisted.
This article lists the orders of the Bacteria.The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) [1] and National Center for Biotechnology Information (NCBI) [2] and the phylogeny is based on 16S rRNA-based LTP release 132 by The All-Species Living Tree Project.
The Bacillales are an order of Gram-positive bacteria, placed within the Bacillota. [1] The Bacillales are the most productive order of the phylum Firmicutes. [2] Representative genera include Bacillus, Listeria and Staphylococcus. [3]