Name: "Thermobacterium lactis" Orla-Jensen 1919

Category: Species

Proposed as: sp. nov.

Etymology: lac’tis. L. gen. neut. n. lactis, milk

Gender: neuter

Type strain: ATCC 12315; CCUG 31454; CIP 101028; DSM 20072; JCM 1248; LMG 7942; NBIMCC 1012; NBRC 102622; NRRL B-4525

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: M58823 Analyse FASTA

Original publication: Orla-Jensen S. The lactic acid bacteria. Høst, Copenhagen, 1919.

Nomenclatural status: not validly published, basonym of name in Approved Lists

Taxonomic status: synonym (and no standing)

Correct name: Lactobacillus delbrueckii subsp. lactis (Orla-Jensen 1919) Weiss et al. 1984

Risk group: 1

• Synonyms:

  • Name	Kind
    Lactobacillus delbrueckii subsp. lactis (Orla-Jensen 1919) Weiss et al. 1984	homotypic synonym, validly published under the ICNP, distinct rank
    Lactobacillus lactis (Orla-Jensen 1919) Bergey et al. 1934 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP

• Notes:
  • ⏰ According to Weiss et al. (1983), this species is an earlier heterotypic synonym of "Bacillus leichmanni" Henneberg 1903 but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Weiss N, Schillinger U, Kandler O. Lactobacillus lactis, Lactobacillus leichmannii and Lactobacillus bulgaricus, Subjective Synonyms of Lactobacillus delbrueckii, and Description of Lactobacillus delbrueckii subsp. lactis comb. nov. and Lactobacillus delbrueckii subsp. bulgaricus comb. nov. Syst Appl Microbiol 1983; 4:552-557.
  • ⏰ According to Weiss et al. (1983), this species is an earlier heterotypic synonym of Lactobacillus leichmannii (Henneberg 1903) Bergey et al. 1923 (Approved Lists 1980) but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Weiss N, Schillinger U, Kandler O. Lactobacillus lactis, Lactobacillus leichmannii and Lactobacillus bulgaricus, Subjective Synonyms of Lactobacillus delbrueckii, and Description of Lactobacillus delbrueckii subsp. lactis comb. nov. and Lactobacillus delbrueckii subsp. bulgaricus comb. nov. Syst Appl Microbiol 1983; 4:552-557.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 1".

Parent taxon: "Thermobacterium" Buchanan 1918

Assigned by: Orla-Jensen S. The lactic acid bacteria. Høst, Copenhagen, 1919.

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Record number: 4128