Name: Peptoniphilus tyrrelliae Citron et al. 2013

Category: Species

Proposed as: sp. nov.

Etymology: tyr.rel’li.ae. N.L. gen. fem. n. tyrrelliae, of Tyrrell, named by the other authors after Kerin L. Tyrrell, for her contributions in anaerobic bacteriology to the R.M. Alden Research Lab

Pronunciation, gender: … tyr-REL-li-a͡e, masculine

Type strain: ATCC BAA-2105; CCUG 59621; JCM 16893; RMA 19911

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: GU938835 Analyse FASTA

Effective publication: Citron DM, Tyrrell KL, Goldstein EJ. Peptoniphilus coxii sp. nov. and Peptoniphilus tyrrelliae sp. nov. isolated from human clinical infections. Anaerobe 2012; 18:244-248. 🇺🇸

IJSEM list: Euzeby JP. Validation list no. 149. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2013; 63:1-5.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

• Synonyms:

  • Name	Kind
    Peptoniphilus senegalensis Mishra et al. 2016	heterotypic synonym, validly published under the ICNP

• Notes:
  • ⏰ According to Aujoulat et al. (2021), this species is an earlier heterotypic synonym of Peptoniphilus senegalensis Mishra et al. 2016. Publication: Aujoulat F, Mazuet C, Criscuolo A, Popoff MR, Enault C, Diancourt L, Jumas-Bilak E, Lavigne JP, Marchandin H. Peptoniphilus nemausensis sp. nov. A new Gram-positive anaerobic coccus isolated from human clinical samples, an emendated description of the genus Peptoniphilus and an evaluation of the taxonomic status of Peptoniphilus species with not validly published names. Syst Appl Microbiol 2021; 44:126235. 🇫🇷
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Garrity GM. List of changes in taxonomic opinion no. 35. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2022; 72:5164.
  • 😷 The risk group for Germany has been imported on 2023-10-29. 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 2 times 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 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. 🇬🇧
  • 🧍 The epithet tyrrelliae is not in accordance with the Recommendation 6(10) of the Bacteriological Code. Publication: Euzeby JP. Validation list no. 149. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2013; 63:1-5.

Parent taxon: Peptoniphilus Ezaki et al. 2001

Assigned by: Citron DM, Tyrrell KL, Goldstein EJ. Peptoniphilus coxii sp. nov. and Peptoniphilus tyrrelliae sp. nov. isolated from human clinical infections. Anaerobe 2012; 18:244-248. 🇺🇸

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Record number: 790368