Species Peptoniphilus duerdenii

Name: Peptoniphilus duerdenii Ulger-Toprak et al. 2012

Category, proposed as: species, sp. nov.

Etymology: duer.de’ni.i. N.L. gen. masc. n. duerdenii, of Duerden, to honour Dr Brian Duerden, a British microbiologist who has contributed much to our knowledge of anaerobic bacteriology

Pronunciation (Latin), gender: pep-to-NI-p^hi-lus du͡er-DE-ni-i, masculine

Type strain: ATCC BAA-1640; CCUG 56065; WAL 18896

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: EU526290 Analyse FASTA

Valid publication: Ulger-Toprak N, Lawson PA, Summanen P, O'Neal L, Finegold SM. Peptoniphilus duerdenii sp. nov. and Peptoniphilus koenoeneniae sp. nov., isolated from human clinical specimens. Int J Syst Evol Microbiol 2012; 62:2336-2341. 🇺🇸

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 62, part 10 of the IJSEM. Int J Syst Evol Microbiol 2013; 63:6-7.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

• 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. 🇬🇧
  • 🧬 The phylogenomic assignment score of this taxon is 0.01065 (N = 8).
  • 😷 The risk group for Germany has been imported on 2026-08-13. The full classification is: risk group = 2. — 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 2026-06-11.
  • 🙆 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 the species itself.
  • 🧍 According to Bartlett et al. (2022), this species is a putative 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: Peptoniphilus Ezaki et al. 2001

Assigned by: Ulger-Toprak N, Lawson PA, Summanen P, O'Neal L, Finegold SM. Peptoniphilus duerdenii sp. nov. and Peptoniphilus koenoeneniae sp. nov., isolated from human clinical specimens. Int J Syst Evol Microbiol 2012; 62:2336-2341. 🇺🇸

Linking: To permanently link to this page, use https://doi.org/10.83108/rn.790205Copy to clipboardLink copied to clipboard

Record number: 790205