Name: Peptostreptococcus lactolyticus Li et al. 1992

Category: Species

Proposed as: sp. nov.

Etymology: lac.to.ly’ti.cus. L. neut. n. lac (gen. lactis), milk; N.L. masc. adj. lyticus, able to loose, able to dissolve; from Gr. masc. adj. lytikos, dissolving; N.L. masc. adj. lactolyticus, milk-dissolving

Pronunciation (Latin), gender: … lak-to-LY-ti-kus, masculine

Type strain: ATCC 51172; CCUG 31351; CIP 103725; DSM 7456; GIFU 8586; JCM 8140

Conduct genome-based taxonomy at

16S rRNA gene: AB673373 Analyse FASTA

Valid publication: Li N, Hashimoto Y, Adnan S, Miura H, Yamamoto H, Ezaki T. Three new species of the genus Peptostreptococcus isolated from humans: Peptostreptococcus vaginalis sp. nov., Peptostreptococcus lacrimalis sp. nov., and Peptostreptococcus lactolyticus sp. nov. Int J Syst Bacteriol 1992; 42:602-605. 🇨🇳

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 42, part 4 of the IJSB. Int J Syst Bacteriol 1993; 43:189.

Nomenclatural status: validly published under the ICNP

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

Correct name: Anaerococcus lactolyticus (Li et al. 1992) Ezaki et al. 2001

Risk group: 2

• Synonyms:

  • Name	Kind
    Anaerococcus lactolyticus (Li et al. 1992) Ezaki et al. 2001	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Peptostreptococcus lactolyticus 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 = "+". — 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.
  • 🎓 Name mentioned 1 time in PubMed until 2025-06-04.
  • 🙅 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 species. The name is on LoRN because of the recorded risk group of the species itself.
  • 🧍 According to Bartlett et al. (2022), this species is an established human pathogen. Publication: Bartlett A, Padfield D, Lear L, Bendall R, Vos M. A comprehensive list of bacterial pathogens infecting humans. Microbiology (Reading) 2022; 168:0. 🇬🇧

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

Assigned by: Li N, Hashimoto Y, Adnan S, Miura H, Yamamoto H, Ezaki T. Three new species of the genus Peptostreptococcus isolated from humans: Peptostreptococcus vaginalis sp. nov., Peptostreptococcus lacrimalis sp. nov., and Peptostreptococcus lactolyticus sp. nov. Int J Syst Bacteriol 1992; 42:602-605. 🇨🇳

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Record number: 779387