Name: Parabacteroides acidifaciens Wang et al. 2019

Category: Species

Proposed as: sp. nov.

Etymology: a.ci.di.fa’ci.ens. L. neut. adj. acidum, acid; L. v. facio, to produce; N.L. masc. part. adj. acidifaciens, acid-producing

Pronunciation, gender: a-ki-di-FA-ki-ens, masculine

Type strain: 426-9; CGMCC 1.13558; NBRC 113433

Conduct genome-based taxonomy at

16S rRNA gene: MH697664 Analyse FASTA

Valid publication: Wang YJ, Xu XJ, Zhou N, Sun Y, Liu C, Liu SJ, You X. Parabacteroides acidifaciens sp. nov., isolated from human faeces. Int J Syst Evol Microbiol 2019; 69:761-766.

IJSEM list: Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 69, part 3 of the IJSEM. Int J Syst Evol Microbiol 2019; 69:1529-1530.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name (and explicitly recommended for medical use)

• Synonyms:

  • Name	Kind
    "Parabacteroides acidifaciens" Liu et al. 2021	homotypic synonym, not validly published

• Notes:
  • 😢 The terminology used by the authors is in line with many other taxonomic studies and does not negatively affect their main results; some improvements may nevertheless be possible. Contrasting the term "chemotaxonomic" with "phenotypic" is not recommended. Whether taxa can have "members" is debatable. See the LPSN phylogeny page for details. Publication: Göker M. What can genome analysis offer for bacteria? In: Bridge P, Smith D, Stackebrandt E (eds), Trends in the systematics of bacteria and fungi, CAB International, Wallingford, 2021, p. 255-281.
  • 🎓 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 the name to be applied to this species. The name is on LoRN because of the recorded risk group of other species in the genus.

Parent taxon: Parabacteroides Sakamoto and Benno 2006

Assigned by: Wang YJ, Xu XJ, Zhou N, Sun Y, Liu C, Liu SJ, You X. Parabacteroides acidifaciens sp. nov., isolated from human faeces. Int J Syst Evol Microbiol 2019; 69:761-766.

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Record number: 800134