Name: Lactobacillus casei subsp. rhamnosus Hansen 1968 (Approved Lists 1980)

Category: Subspecies

Proposed as: subsp. nov.

Etymology: rham.no’sus. N.L. masc. adj. rhamnosus, pertaining to rhamnose [probably better: rhamnosicus]

Gender: masculine

Type strain: ATCC 7469; CCUG 21452; CIP A157; DSM 20021; IFO 3425; JCM 1136; LMG 6400; NBIMCC 1010; NBRC 3425; NCAIM B.01147; NCCB 46033; NCDO 243; NCFB 243; NCIB 6375; NCIMB 6375; NCTC 12953; NRRL B-442; VKM B-57; VKM B-574

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: D16552 Analyse FASTA

Effective publication: Hansen PA. Type strains of Lactobacillus species. A report by the Taxonomic Subcommittee on Lactobacilli and Closely Related Organisms. American Type Culture Collection, Rockville, Maryland, 1968.

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: synonym

Correct name: Lacticaseibacillus rhamnosus (Hansen 1968) Zheng et al. 2020

Risk group: 2

• Synonyms:

  • Name	Kind
    Lactobacillus rhamnosus (Hansen 1968) Collins et al. 1989	homotypic synonym, validly published under the ICNP, distinct rank
    Lacticaseibacillus rhamnosus (Hansen 1968) Zheng et al. 2020	homotypic synonym, validly published under the ICNP, distinct rank

• Notes:
  • ❗ Lactobacillus casei subsp. rhamnosus is the correct name instead if this subspecies is regarded as a separate subspecies (i.e., if its nomenclatural type is not assigned to another subspecies whose name is validly published, legitimate and not rejected and has priority) within a separate species Lactobacillus casei within a separate genus Lactobacillus.
  • 😷 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". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1, note = "PIIC Many strains of L. rhamnosus are classifed risk class 1 and are used as food and feed bacteria or as probiotics. However some strains are assumed to be opportunistic pathogens.". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 2, note = "TA".

Parent taxon: Lactobacillus casei (Orla-Jensen 1916) Hansen and Lessel 1971 (Approved Lists 1980)

Assigned by: Hansen PA. Type strains of Lactobacillus species. A report by the Taxonomic Subcommittee on Lactobacilli and Closely Related Organisms. American Type Culture Collection, Rockville, Maryland, 1968.

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Record number: 777273