Name: Gemella haemolysans (Thjøtta and Bøe 1938) Berger 1960 (Approved Lists 1980)

Category: Species

Proposed as: comb. nov.

Basonym: "Neisseria haemolysans" Thjøtta and Bøe 1938

Etymology: hae.mo.ly.sans. Gr. neut. n. haîma, blood; Gr. ind. v. lyô, dissolve, break up; N.L. fem. part. adj. haemolysans, dissolving blood

Gender: feminine

Type strain: ATCC 10379; CCUG 37985; CIP 101126; LMG 18984; NCTC 12968

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: M58799 Analyse FASTA

Effective publication: Berger U. [Neisseria haemolysans (Thjotta and Boe, 1938): studies on its place in the system]. Z Hyg Infektionskr 1960; 146:253-259.

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

• Synonyms:

  • Name	Kind
    "Neisseria haemolysans" Thjøtta and Bøe 1938	homotypic synonym, not validly published, basonym of name in Approved Lists

• Notes:
  • 🥇 Nomenclatural type of the genus Gemella Berger 1960 (Approved Lists 1980). Publication: Berger U. [Neisseria haemolysans (Thjotta and Boe, 1938): studies on its place in the system]. Z Hyg Infektionskr 1960; 146:253-259.
  • 😷 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 = 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 150 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: Gemella Berger 1960 (Approved Lists 1980)

Assigned by: Berger U. [Neisseria haemolysans (Thjotta and Boe, 1938): studies on its place in the system]. Z Hyg Infektionskr 1960; 146:253-259.

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Record number: 783898