Subspecies Alcaligenes denitrificans subsp. xylosoxydans

Name: Alcaligenes denitrificans subsp. xylosoxydans (Yabuuchi and Yano 1981 ex Yabuuchi and Ohyama 1971) Kersters and De Ley 1984

Category, proposed as: subspecies, comb. nov.

Basonym: Achromobacter xylosoxidans (ex Yabuuchi and Ohyama 1971) Yabuuchi and Yano 1981

Etymology: xy.los.o’xy.dans. N.L. neut. n. xylosum, xylose, wood sugar; from Gr. neut. n. xylon, wood; N.L. v. oxydo, to oxidize; from Gr. masc. adj. oxys, sour, acid; N.L. masc. part. adj. xylosoxydans, oxidizing xylose

Pronunciation (Latin), gender: al-ka-LI-ge-nes de-ni-TRI-fi-kans xy-los-O-xy-dans, masculine

Type strain: ATCC 27061; CCUG 56438; CIP 71.32; DSM 10346; DSM 2402; Hugh 2838; IFO 15126; JCM 9659; KM543; LMG 1863; NBRC 15126; NCTC 10807; NRRL B-4082; Yabuuchi KM 543

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: Y14908 Analyse FASTA

Effective publication: Kersters K, De Ley J. Genus Alcaligenes. In: Krieg NR, Holt JG (eds), Bergey's Manual of Systematic Bacteriology, first edition, vol. 1, The Williams & Wilkins Co, Baltimore, 1984, p. 361-373.

IJSEM list: Anonymous. Validation list no. 15. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1984; 34:355-357.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym (and not recommended for medical use)

Correct name: Achromobacter xylosoxidans (ex Yabuuchi and Ohyama 1971) Yabuuchi and Yano 1981

Risk group: 2

• Synonyms:

  • Name	Kind
    "Alcaligenes xylosoxydans" (Yabuuchi and Yano 1981 ex Yabuuchi and Ohyama 1971) Dewhirst et al. 1989	homotypic synonym, not validly published, distinct rank
    Alcaligenes xylosoxidans (Yabuuchi and Yano 1981 ex Yabuuchi and Ohyama 1971) Kiredjian et al. 1986	homotypic synonym, validly published under the ICNP, distinct rank
    Achromobacter xylosoxidans (ex Yabuuchi and Ohyama 1971) Yabuuchi and Yano 1981	homotypic synonym, validly published under the ICNP, distinct rank
    "Achromobacter xylosoxidans" Yabuuchi and Ohyama 1971	homotypic synonym, not validly published, distinct rank

• Notes:
  • ❗ Alcaligenes denitrificans subsp. xylosoxydans is the correct name instead if this subspecies is regarded as a separate subspecies (i.e., if its nomenclatural type is not assigned to another subspecies whose name is validly published, legitimate and not rejected and has priority) within a separate species Alcaligenes denitrificans within a separate genus Alcaligenes.
  • 😷 The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1. — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 2, note = "(spelled 'Alcaligenes denitrificans subsp. xylosoxidans' in TRBA)". — If in doubt, use the risk group given in the regulations for your country and, if these are not available, use the risk group given in the catalogue of the culture collection from which you have obtained or intend to obtain the strain.
  • 🙅 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as a synonym of the name to be applied to this subspecies. The name is on LoRN because of the recorded risk group of the species itself.
  • 🧍 Although the name Alcaligenes denitrificans subsp. xylosoxydans has been validly published, it has not priority. Publication: Kiredjian M, Holmes B, Kersters K, Guilvout I, De Ley J. Alcaligenes piechaudii, a new species from human clinical specimens and the environment. Int. J. Syst. Bacteriol. 1986; 36:282-287. 🇬🇧
  • 🧍 Alcaligenes xylosoxidans subsp. xylosoxidans (Yabuuchi and Yano 1981) Kiredjian et al. 1986, and Alcaligenes xylosoxidans subsp. denitrificans (Rüger and Tan 1983) Kiredjian et al. 1986 are distinct species. Formal nomenclatural modifications are not required as both Alcaligenes denitrificans (ex Leifson and Hugh 1954) Rüger and Tan 1983, and Alcaligenes xylosoxidans (Yabuuchi and Yano 1981) Kiredjian et al. 1986 were validly published. The name Alcaligenes xylosoxidans, however, should be used only for strains previously classified as Achromobacter xylosoxidans (ex Yabuuchi and Ohyama 1971) Yabuuchi and Yano 1981 or Alcaligenes xylosoxidans subsp. xylosoxidans (Yabuuchi and Yano 1981) Kiredjian et al. 1986. Publication: Vandamme P, Heyndrickx M, Vancanneyt M, Hoste B, De Vos P, Falsen E, Kersters K, Hinz KH. Bordetella trematum sp. nov., isolated from wounds and ear infections in humans, and reassessment of Alcaligenes denitrificans Ruger and Tan 1983. Int J Syst Bacteriol 1996; 46:849-858. 🇧🇪
  • 🧍 The spelling is xylosoxidans in the nomenclatural name Achromobacter xylosoxidans (ex Yabuuchi and Ohyama 1971) Yabuuchi and Yano 1981. However, the spelling is xylosoxydans in the nomenclatural name Alcaligenes denitrificans subsp. xylosoxydans (Yabuuchi and Yano 1981) Kersters and De Ley 1984. In Latin, "y" is a letter borrowed from the Greek in order to represent the Greek upsilon (υ). The root of the word is the Greek adjective οςυζ (Latin transliteration oxys) and the spelling xylosoxydans seems better than xylosoxidans. Publication: Euzeby JP. List of Bacterial Names with Standing in Nomenclature: a folder available on the Internet. Int J Syst Bacteriol 1997; 47:590-592. 🇫🇷

Parent taxon: Alcaligenes denitrificans (ex Leifson and Hugh 1954) Rüger and Tan 1983

Assigned by: Kersters K, De Ley J. Genus Alcaligenes. In: Krieg NR, Holt JG (eds), Bergey's Manual of Systematic Bacteriology, first edition, vol. 1, The Williams & Wilkins Co, Baltimore, 1984, p. 361-373.

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Record number: 773009