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Genus Hafnia

Warning: In the List of Prokaryotic names with Standing in Nomenclature, an arrow () only indicates the sequence of valid publication of names and does not mean that the last name in the sequence must be used (see: Introduction).

Number of species cited in this file: 3
Number of subspecies cited in this file: 0

Classification (Warning: see also the file "Classification of prokaryotes: Introduction").


For a detailed description of this taxon see Bergey’s Manual of Systematics of Archaea and Bacteria (BMSAB).


 

Hafnia Møller 1954, genus.
Type species: ¤ Hafnia alvei Møller 1954 (Approved Lists 1980).
Etymology: N.L. fem. n. Hafnia, the old name for Copenhagen.
Approved Lists reference: SKERMAN (V.B.D.), McGOWAN (V.) and SNEATH (P.H.A.) (editors): Approved Lists of Bacterial Names. Int. J. Syst. Bacteriol., 1980, 30, 225-420 (Approved Lists of Bacterial Names in IJSEM Online - Approved Lists of Bacterial Names Amended edition).
Original publication: MØLLER (V.): Distribution of amino acid decarboxylases in Enterobacteriaceae. Acta Pathologica et Bacteriologica Scandinavica, 1954, 35, 259-277.

Notes:
1 Despite close phenotypic similarities, there are at least two distinct DNA-DNA hybridisation groups (HG) in Hafnia. The type strain (ATCC 13337= NCTC 8105) falls in Group 1 (along with reference strain ATCC 29926, leaving Group 2 (containing strain ATCC 29927 unnamed. Similarly, there are two groups within ¤ Obesumbacterium proteus; these are separable by biochemical characters and DNA-DNA hybridisation. However, despite having distinct phenotypic differences, Obesumbacterium proteus group 1 (type strain ATCC 12841 is 75% related to DNA group 1 of ¤ Hafnia alvei (though only 52% related to DNA group 2 of Hafnia alvei); these two organisms are thus a single species, ¤ Hafnia alvei. This leaves two separate unnamed groups (Hafnia alvei HG2 and Obesumbacterium proteus HG2) that are not closely related.
In April 2010, Priest and Barker validly publish the name ¤ Shimwellia pseudoproteus for Obesumbacterium proteus HG2 strains.
In July 2010, Huys et al. validly publish the name ¤ Hafnia paralvei for Hafnia alvei HG2 strains.
References:
1 HOLMES (B.) and FARMER III (J.J.): International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of Enterobacteriaceae. Minutes of the meetings, 7 August 2008, Istanbul, Turkey. Int. J. Syst. Evol. Microbiol., 2009, 59, 2643-2645.
Original article in IJSEM Online
2 PRIEST (F.G.) and BARKER (M.): Gram-negative bacteria associated with brewery yeasts: reclassification of Obesumbacterium proteus biogroup 2 as Shimwellia pseudoproteus gen. nov., sp. nov., and transfer of Escherichia blattae to Shimwellia blattae comb. nov. Int. J. Syst. Evol. Microbiol., 2010, 60, 828-833.
Original article in IJSEM Online
3 HUYS (G.), CNOCKAERT (M.), ABBOTT (S.L.), JANDA (J.M.) and VANDAMME (P.): Hafnia paralvei sp. nov., formerly known as Hafnia alvei hybridization group 2. Int. J. Syst. Evol. Microbiol., 2010, 60, 1725-1728.
Original article in IJSEM Online
2 Comparison of the MLST sequences show only 95% similarity between Obesumbacterium proteus HG1 and Hafnia alvei HG1. Priest and Barker therefore recommend that Obesumbacterium proteus HG1 strains retain the name ¤ Obesumbacterium proteus until the systematics of the genus ¤ Hafnia have been clarified and the relationships between these bacteria and Hafnia alvei are understood more clearly.
Reference: PRIEST (F.G.) and BARKER (M.): Gram-negative bacteria associated with brewery yeasts: reclassification of Obesumbacterium proteus biogroup 2 as Shimwellia pseudoproteus gen. nov., sp. nov., and transfer of Escherichia blattae to Shimwellia blattae comb. nov. Int. J. Syst. Evol. Microbiol., 2010, 60, 828-833.
Original article in IJSEM Online

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Hafnia alvei Møller 1954, species. (Type species of the genus.)
Type strain: (see also StrainInfo.net) ATCC 13337= CCUG 41547 = CIP 57.31 = DSM 30163 = HAMBI 1279 = HAMBI 1876 = JCM 1666 = LMG 10392 = NCTC 8105 = NRRL B-4260.
Sequence accession no. (16S rRNA gene) for the type strain: M59155.
Synonyms: "Enterobacter alvei" (Møller 1954) Sakazaki 1961, "Enterobacter aerogenes subsp. hafniae" Ewing 1963, "Enterobacter hafniae" Ewing and Fife 1968, not "Bacillus paratyphi-alvei" Bahr 1919.
Etymology: L. gen. n. alvei, of a beehive.
Approved Lists reference: SKERMAN (V.B.D.), McGOWAN (V.) and SNEATH (P.H.A.) (editors): Approved Lists of Bacterial Names. Int. J. Syst. Bacteriol., 1980, 30, 225-420 (Approved Lists of Bacterial Names in IJSEM Online - Approved Lists of Bacterial Names Amended edition).
Original publication: MØLLER (V.): Distribution of amino acid decarboxylases in Enterobacteriaceae. Acta Pathologica et Bacteriologica Scandinavica, 1954, 35, 259-277.

Notes:
1 The strains of "Hafnia alvei-like", isolated from cases of diarrhoeal disease by the International Centre for Diarrhoeal Disease Research Branch (ICDDRB) in Bangladesh, are now known as ¤ Escherichia albertii Huys et al. 2003.
2 Despite close phenotypic similarities, there are at least two distinct DNA-DNA hybridisation groups (HG) in Hafnia. The type strain (ATCC 13337= NCTC 8105) falls in Group 1 (along with reference strain ATCC 29926, leaving Group 2 (containing strain ATCC 29927 unnamed. Similarly, there are two groups within ¤ Obesumbacterium proteus; these are separable by biochemical characters and DNA-DNA hybridisation. However, despite having distinct phenotypic differences, Obesumbacterium proteus group 1 (type strain ATCC 12841 is 75% related to DNA group 1 of Hafnia alvei (though only 52% related to DNA group 2 of Hafnia alvei); these two organisms are thus a single species, Hafnia alvei.  This leaves two separate unnamed groups (Hafnia alvei HG2 and Obesumbacterium proteus HG2) that are not closely related.
In April 2010, Priest and Barker validly publish the name ¤ Shimwellia pseudoproteus for Obesumbacterium proteus HG2 strains.
In July 2010, Huys et al. validly publish the name ¤ Hafnia paralvei for Hafnia alvei HG2 strains.
References:
1 HOLMES (B.) and FARMER III (J.J.): International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of Enterobacteriaceae. Minutes of the meetings, 7 August 2008, Istanbul, Turkey. Int. J. Syst. Evol. Microbiol., 2009, 59, 2643-2645.
Original article in IJSEM Online
2 PRIEST (F.G.) and BARKER (M.): Gram-negative bacteria associated with brewery yeasts: reclassification of Obesumbacterium proteus biogroup 2 as Shimwellia pseudoproteus gen. nov., sp. nov., and transfer of Escherichia blattae to Shimwellia blattae comb. nov. Int. J. Syst. Evol. Microbiol., 2010, 60, 828-833.
Original article in IJSEM Online
3 HUYS (G.), CNOCKAERT (M.), ABBOTT (S.L.), JANDA (J.M.) and VANDAMME (P.): Hafnia paralvei sp. nov., formerly known as Hafnia alvei hybridization group 2. Int. J. Syst. Evol. Microbiol., 2010, 60, 1725-1728.
Original article in IJSEM Online
3 Comparison of the MLST sequences show only 95% similarity between Obesumbacterium proteus HG1 and Hafnia alvei HG1. Priest and Barker therefore recommend that Obesumbacterium proteus HG1 strains retain the name ¤ Obesumbacterium proteus until the systematics of the genus Hafnia have been clarified and the relationships between these bacteria and Hafnia alvei are understood more clearly.
Reference: PRIEST (F.G.) and BARKER (M.): Gram-negative bacteria associated with brewery yeasts: reclassification of Obesumbacterium proteus biogroup 2 as Shimwellia pseudoproteus gen. nov., sp. nov., and transfer of Escherichia blattae to Shimwellia blattae comb. nov. Int. J. Syst. Evol. Microbiol., 2010, 60, 828-833.
Original article in IJSEM Online

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Hafnia paralvei Huys et al. 2010, sp. nov.
Type strain: (see also StrainInfo.net) ATCC 29927= CDC 4510-73 = LMG 24706.
Sequence accession no. (16S rRNA gene) for the type strain: FM179943.
Etymology: Gr. prep. para (also shortened to par), besides; L. gen. n. alvei, of a beehive and also a bacterial epithet; N.L. gen. n. paralvei, organism similar to Hafnia alvei.
Valid publication: HUYS (G.), CNOCKAERT (M.), ABBOTT (S.L.), JANDA (J.M.) and VANDAMME (P.): Hafnia paralvei sp. nov., formerly known as Hafnia alvei hybridization group 2. Int. J. Syst. Evol. Microbiol., 2010, 60, 1725-1728.
Original article in IJSEM Online

Note: Hafnia paralvei Huys et al. 2010 was previously known as Hafnia alvei hybridisation group 2 or as Hafnia alvei biogroup 2.

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Hafnia psychrotolerans Gu et al. 2015, sp. nov.
Type strain: (see also StrainInfo.net) DJC1-1=JCM 30077=CGMCC1.12806.
Sequence accession no. (16S rRNA) for the type strain: KJ023821.
Etymology: Gr. adj. psuchros, cold; L. part. adj. tolerans, tolerating; N.L. part. adj. psychrotolerans, tolerating cold.
Source: Environmental - freshwater.
Valid publication: GU, Z., LIU, Y., SHEN, L., LIU, X., XIAO, N., JIAO, N., LIU, H., ZHOU, Y. and ZHANG, S. 2015. Hafnia psychrotolerans sp. nov., isolated from lake water. Int. J. Syst. Evol. Microbiol., 65, 971-974.
Original article in IJSEM Online

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