Name: Williamsia muralis Kämpfer et al. 1999

Category: Species

Proposed as: sp. nov.

Etymology: mu.ra’lis. L. fem. adj. muralis, pertaining or belonging to wall(s)

Pronunciation, gender: mu-RA-lis, feminine

Type strain: CIP 106979; DSM 44343; IFM 10085; JCM 10676; KCTC 9830; MA140/96

Conduct genome-based taxonomy at

16S rRNA gene: Y17384 Analyse FASTA

Valid publication: Kampfer P, Andersson MA, Rainey FA, Kroppenstedt RM, Salkinoja-Salonen M. Williamsia muralis gen. nov., sp. nov., isolated from the indoor environment of a children's day care centre. Int J Syst Bacteriol 1999; 49:681-687. 🇩🇪

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 49, part 2 of the IJSB. Int J Syst Bacteriol 1999; 49:937-939.

Nomenclatural status: validly published under the ICNP

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

Risk group: 1

• Synonyms:

  • Name	Kind
    Williamsia marianensis Pathom-aree et al. 2006	heterotypic synonym, validly published under the ICNP

• Emendations:
  • Kumar et al. 2024 Kumar A, Sood U, Garg G, Lal R, Rawat CD. Genome-based reclassification of Williamsia marianensis as a later heterotypic synonym of Williamsia muralis. Int J Syst Evol Microbiol 2024; 74:6485. 🇮🇳 Oren A, Göker M. Notification list. Notification that new names and new combinations have appeared in volume 74, part 8 of the IJSEM. Int J Syst Evol Microbiol 2024; 74:6534.
    Notes:
    • 🫂 Emendation accompanied by a proposal regarding the synonymy of the species.

• Notes:
  • 🥇 Nomenclatural type of the genus Williamsia Kämpfer et al. 1999. Publication: Kampfer P, Andersson MA, Rainey FA, Kroppenstedt RM, Salkinoja-Salonen M. Williamsia muralis gen. nov., sp. nov., isolated from the indoor environment of a children's day care centre. Int J Syst Bacteriol 1999; 49:681-687. 🇩🇪
  • ⏰ According to Kumar et al. (2024), this species is an earlier heterotypic synonym of Williamsia marianensis Pathom-aree et al. 2006. Publication: Kumar A, Sood U, Garg G, Lal R, Rawat CD. Genome-based reclassification of Williamsia marianensis as a later heterotypic synonym of Williamsia muralis. Int J Syst Evol Microbiol 2024; 74:6485. 🇮🇳
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Göker M. Notification list. Notification that new names and new combinations have appeared in volume 74, part 8 of the IJSEM. Int J Syst Evol Microbiol 2024; 74:6534.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1. — 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 9 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 pathogenicity 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. 🇬🇧
  • 🧍 In our database until 2005 erroneously listed as Williamsia murale. — Leibniz Institute DSMZ. Prokaryotic Nomenclature Up-to-date, 2018-12-11.

Parent taxon: Williamsia Kämpfer et al. 1999

Assigned by: Kampfer P, Andersson MA, Rainey FA, Kroppenstedt RM, Salkinoja-Salonen M. Williamsia muralis gen. nov., sp. nov., isolated from the indoor environment of a children's day care centre. Int J Syst Bacteriol 1999; 49:681-687. 🇩🇪

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Record number: 783106