Name: Cutibacterium acnes subsp. defendens (McDowell et al. 2016) Nouioui et al. 2018

Category: Subspecies

Proposed as: comb. nov.

Basonym: Propionibacterium acnes subsp. defendens McDowell et al. 2016

Etymology: de.fen’dens. L. neut. part. adj. defendens, defending, guarding, protecting, referring to the CRISPR/Cas system of the strains

Pronunciation, gender: de-FEN-dens, neuter

Type strain: ATCC 11828; CCUG 6369; JCM 6473

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB573714 Analyse FASTA

Effective publication: Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007. 🇩🇪

IJSEM list: Oren A, Garrity GM. Validation list no. 184. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2018; 68:3379-3393.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

• Synonyms:

  • Name	Kind
    Propionibacterium acnes subsp. defendens McDowell et al. 2016	homotypic synonym, validly published under the ICNP

• Emendations:
  • Dekio et al. 2019 Dekio I, McDowell A, Sakamoto M, Tomida S, Ohkuma M. Proposal of new combination, Cutibacterium acnes subsp. elongatum comb. nov., and emended descriptions of the genus Cutibacterium, Cutibacterium acnes subsp. acnes and Cutibacterium acnes subsp. defendens. Int J Syst Evol Microbiol 2019; 69:1087-1092. 🇯🇵 Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 69, part 4 of the IJSEM. Int J Syst Evol Microbiol 2019; 69:1847-1849.

• Notes:
  • 😩 Deposits incorrectly indicated in some sources as representing the type strain of this taxon: ATCC 6919; CCUG 1794; DSM 1897; JCM 6425; NCTC 737.
  • 😷 The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 2, note = "TA". — 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.
  • 🙆 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as the name to be applied to this subspecies. The name is on LoRN because of the recorded risk group of the species itself.

Parent taxon: Cutibacterium acnes (Gilchrist 1900) Scholz and Kilian 2016

Assigned by: Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007. 🇩🇪

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Record number: 798788