Name: Aerococcus christensenii Collins et al. 1999

Category: Species

Proposed as: sp. nov.

Etymology: chris.ten.se’ni.i. N.L. gen. masc. n. christensenii, named after the Danish microbiologist, Jens J. Christensen

Pronunciation, gender: k^hris-ten-SE-ni-i, masculine

Type strain: CCUG 28831; CIP 106115; DSM 15819; UWO 6

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: Y17005 Analyse FASTA

Valid publication: Collins MD, Jovita MR, Hutson RA, Ohlen M, Falsen E. Aerococcus christensenii sp. nov., from the human vagina. Int J Syst Bacteriol 1999; 49:1125-1128.

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 49, part 3 of the IJSB. Int J Syst Bacteriol 1999; 49:1327-1328.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

• Emendations:
  • Tohno et al. 2014 Tohno M, Kitahara M, Matsuyama S, Kimura K, Ohkuma M, Tajima K. Aerococcus vaginalis sp. nov., isolated from the vaginal mucosa of a beef cow, and emended descriptions of Aerococcus suis, Aerococcus viridans, Aerococcus urinaeequi, Aerococcus urinaehominis, Aerococcus urinae, Aerococcus christensenii and Aerococcus sanguinicola. Int J Syst Evol Microbiol 2014; 64:1229-1236. Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 64, part 4 of the IJSEM. Int J Syst Evol Microbiol 2014; 64:2188-2190.
    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.

• Notes:
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 2, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 2". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 2. — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1, note = "+". — 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 19 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 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: Aerococcus Williams et al. 1953 (Approved Lists 1980)

Assigned by: Collins MD, Jovita MR, Hutson RA, Ohlen M, Falsen E. Aerococcus christensenii sp. nov., from the human vagina. Int J Syst Bacteriol 1999; 49:1125-1128.

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Record number: 772877