Name: Peptostreptococcus hydrogenalis Ezaki et al. 1990

Category: Species

Proposed as: sp. nov.

Etymology: hy.dro.ge.na.lis. N.L. neut. n. hydrogenum, hydrogen (that which produces water, so called because it forms water when exposed to oxygen); from Gr. neut. n. hydôr, water; from Gr. ind. v. gennaô, to produce; L. masc./fem. adj. suff. -alis, suffix used with the sense of pertaining to; N.L. masc./fem. adj. hydrogenalis, pertaining to hydrogen, because this organism produces hydrogen

Gender: masculine

Type strain: ATCC 49630; DSM 7454; GIFU 7662; JCM 7635

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB538433 Analyse FASTA

Valid publication: Ezaki T, Liu SL, Hashimoto Y, Yabuuchi E. Peptostreptococcus hydrogenalis sp. nov. from human fecal and vaginal flora. Int J Syst Bacteriol 1990; 40:305-306.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Anaerococcus hydrogenalis (Ezaki et al. 1990) Ezaki et al. 2001

Risk group: 2

• Synonyms:

  • Name	Kind
    Anaerococcus hydrogenalis (Ezaki et al. 1990) Ezaki et al. 2001	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Peptostreptococcus hydrogenalis is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Peptostreptococcus.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 2, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 2". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1, note = "PIIC". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1, note = "+".
  • 🎓 Name mentioned 1 time in PubMed until 2024-03-28.

Parent taxon: Peptostreptococcus Kluyver and van Niel 1936 (Approved Lists 1980)

Assigned by: Ezaki T, Liu SL, Hashimoto Y, Yabuuchi E. Peptostreptococcus hydrogenalis sp. nov. from human fecal and vaginal flora. Int J Syst Bacteriol 1990; 40:305-306.

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Record number: 779383