Brachybacterium

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Brachybacterium
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Domain: Bacteria
Phylum: Actinomycetota
Class: Actinomycetia
Order: Micrococcales
Family: Dermabacteraceae
Genus: Brachybacterium
Collins et al. 1988 [1]
Type species
Brachybacterium faecium
Collins et al. 1988
Species

See text.

Brachybacterium is a genus of Gram positive, nonmotile bacteria. The cells are coccoid during the stationary phase, and irregular rods during the exponential phase. The genus name comes from Greek word brachy, meaning short, and Latin bacterium, meaning rods, referencing the short rods noted during the exponential phase. [1]

The type species of the genus, Brachybacterium faecium, was first isolated from poultry deep litter in 1966 along with several other species. [2] Speciation of the strains was performed in 1975, but three of the strains did not cluster with any known taxon. [3] In 1988, further work was performed on the previously unclassified organisms, and the current genus was proposed. [1] Brachybacteria have been isolated from a stool sample of a healthy three-year-old girl, [4] garden soil, [5] Beaufort cheese, medieval wall paintings, a mouse liver, roots, salt fermented seafood, oil-contaminated coastal sand, sediment samples, and seawater. [6] [7] A strain of Brachybacterium has been indicated as the cause of bloodborne infection in an 83 year-old man. [8]

Species

Brachybacterium comprises the following species: [9]

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Brachybacterium tyrofermentans is a species of Gram positive, facultatively anaerobic, pale yellow-pigmented bacterium. The cells are coccoid during the stationary phase, and irregular rods during the exponential phase. It was first isolated from the surfaces of Beaufort and Gruyère cheeses in 1978, along with Brachybacterium alimentarium. Further work led to the proposal of the new species in 1996, and the name is derived from the Latin tyros (cheese) and fermentans (leavening), referring to the fermented cheese from which it was first isolated.

Brachybacterium paraconglomeratum is a species of Gram positive, facultatively anaerobic, pale brown pigmented bacterium. The cells are coccoid during the stationary phase, and irregular rods during the exponential phase. The species was identified when a strain of Brachybacterium faecium was found to be a different species of Brachybacterium. The name is derived from Latin para and conglomeratum. B. paraconglomeratum resembles Brachybacterium conglomeratum phenotypically, and but are separate species based on DNA–DNA hybridization. B. paraconglomeratum and B. conglomeratum were first proposed as species in the same paper in 1995, along with B. rhamnosum.

Brachybacterium faecium is a species of Gram positive, facultatively anaerobic bacterium. Colony pigmentation is grey, white, or pale yellow. The cells are coccoid during the stationary phase, and irregular rods during the exponential phase. It was first isolated from poultry deep litter in 1966. The species was the first proposed for genus Brachybacterium in 1988, and is the type strain for the genus. The name is derived from the Latin faecium, referring to the poultry litter from which it was first isolated.

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References

  1. 1 2 3 Collins MD, Brown J, Jones D. (1988). "Brachybacterium faecium gen. nov., sp. nov., a coryneform bacterium from poultry deep litter". Int. J. Syst. Bacteriol. 38: 45–48. doi: 10.1099/00207713-38-1-45 .
  2. Schefferle HE. (1966). "Coryneform bacteria in poultry deep litter". J. Appl. Bacteriol. 29 (1): 147–160. doi:10.1111/j.1365-2672.1966.tb03462.x.
  3. Jones D. (1975). "A numerical taxonomic study of coryneform and related bacteria". J. Gen. Microbiol. 87 (1): 8752–96. doi: 10.1099/00221287-87-1-52 . PMID   805825.
  4. Tidjani-Alou M, Cadoret F, Brah S, Diallo A, Sokhna C, Mehrej V, Lagier JC, Fournier PE, Raoult D. (2017). ""Khelaifiella massiliensis", "Niameybacter massiliensis", "Brachybacterium massiliense", "Enterobacter timonensis", "Massilibacillus massiliensis", new bacterial species and genera isolated from the gut microbiota of healthy infants". New Microbes and New Infections. 19 (19): 1–7. doi:10.1016/j.nmni.2017.02.002. PMC   5477064 . PMID   28652919. (This paper currently has an expression of concern, see doi:10.1016/j.nmni.2024.101331, PMID   38799901,  Retraction Watch . If this is an intentional citation to a such a paper, please replace {{ expression of concern |...}} with {{ expression of concern |...|intentional=yes}}.)
  5. Singh H, Du J, Yang JE, Yin CS, Kook M, Yi TH. (2016). "Brachybacterium horti sp. nov., isolated from garden soil". International Journal of Systematic and Evolutionary Microbiology. 66 (1): 189–95. doi: 10.1099/ijsem.0.000696 . PMID   26476895.
  6. Kaur G, Kumar N, Mual P, Kumar A, Kumar RM, Mayilraj S. (2016). "Brachybacterium aquaticum sp. nov., a novel actinobacterium isolated from seawater". International Journal of Systematic and Evolutionary Microbiology. 66 (11): 4705–10. doi: 10.1099/ijsem.0.001414 . PMID   27514821..
  7. Gontia I, Kavita K, Schmid M, Hartmann A, Jha B. (2011). "Brachybacterium saurashtrense sp. nov., a halotolerant root-associated bacterium with plant growth-promoting potential". International Journal of Systematic and Evolutionary Microbiology. 61 (12): 2799–2804. doi: 10.1099/ijs.0.023176-0 . PMID   21216918.
  8. Tamai, Kiyoko; Akashi, Yusaku; Yoshimoto, Yuta; Yaguchi, Yuji; Takeuchi, Yosuke; Shiigai, Masanari; Igarashi, Jun; Hirose, Yumi; Suzuki, Hiromichi; Ohkusu, Kiyofumi (December 2018). "First case of a bloodstream infection caused by the genus Brachybacterium". Journal of Infection and Chemotherapy. 24 (12): 998–1003. doi:10.1016/j.jiac.2018.06.005. PMID   30007866. S2CID   206162922.
  9. Euzéby JP, Parte AC. "Brachybacterium". List of Prokaryotic names with Standing in Nomenclature (LPSN). Retrieved May 18, 2022.