Name: Aerococcus viridans Williams et al. 1953 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: vi.ri’dans. L. masc. part. adj. viridans, making green, producing a green color

Gender: masculine

Type strain: ATCC 11563; CCUG 4311; CIP 54.145; DSM 20340; HAMBI 1583; IFO 12219; JCM 20461; LMG 17931; NBIMCC 8874; NBRC 12219; NCAIM B.01070; NCTC 8251

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: M58797 Analyse FASTA

Effective publication: Williams RE, Hirch A, Cowan ST. Aerococcus, a new bacterial genus. J Gen Microbiol 1953; 8:475-480.

IJSEM list: Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

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:
  • 🥇 Nomenclatural type of the genus Aerococcus Williams et al. 1953 (Approved Lists 1980). Publication: Williams RE, Hirch A, Cowan ST. Aerococcus, a new bacterial genus. J Gen Microbiol 1953; 8:475-480.
  • 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 2, note = "human and animal pathogen - biological class of risk animal: 2". — The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 2, note = "Animal classification RG: 2 - 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, note = "TA". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 2. — The risk group for Taiwan has been imported on 2024-11-03. The full classification is: risk group = 2, note = "P650 = v". — 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 252 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.

Parent taxon: Aerococcus Williams et al. 1953 (Approved Lists 1980)

Assigned by: Williams RE, Hirch A, Cowan ST. Aerococcus, a new bacterial genus. J Gen Microbiol 1953; 8:475-480.

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Record number: 772883