Species Lacticaseibacillus rhamnosus

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

Category, proposed as: species, comb. nov.

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

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

Pronunciation (Latin), gender: lak-ti-ka-se-i-ba-KIL-lus r^ham-NO-sus, 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

Conduct genome-based taxonomy at

16S rRNA gene: D16552 Analyse FASTA

Valid publication: Zheng J, Wittouck S, Salvetti E, Franz CMAP, Harris HMB, Mattarelli P, O'Toole PW, Pot B, Vandamme P, Walter J, et al. A taxonomic note on the genus Lactobacillus: Description of 23 novel genera, emended description of the genus Lactobacillus Beijerinck 1901, and union of Lactobacillaceae and Leuconostocaceae. Int J Syst Evol Microbiol 2020; 70:2782-2858. 🇮🇹

IJSEM list: Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 70, part 4 of the IJSEM. Int J Syst Evol Microbiol 2020; 70:4050-4060.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

• Synonyms:

  • Name	Kind
    Lactobacillus casei subsp. rhamnosus Hansen 1968 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP, distinct rank
    Lactobacillus rhamnosus (Hansen 1968) Collins et al. 1989	homotypic synonym, validly published under the ICNP

• Notes:
  • 🧬 The phylogenomic assignment score of this taxon is 0.23406 (N = 28).
  • 😷 The risk group for Germany has been imported on 2026-08-13. The full classification is: risk group = 2, note = "TA". — 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 1057 times in PubMed until 2026-06-11.
  • 🫡 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. This name is not taxonomically suspended any more in favour of Lactobacillus rhamnosus (Hansen 1968) Collins et al. 1989. Publication: Collins MD, Phillips BA, Zanoni P. Deoxyribonucleic acid homology studies of Lactobacillus casei, Lactobacillus paracasei sp. nov., subsp. paracasei and subsp. tolerans, and Lactobacillus rhamnosus sp. nov., comb. nov. Int. J. Syst. Bacteriol. 1989; 39:105-108. 🇬🇧

Parent taxon: Lacticaseibacillus Zheng et al. 2020

Assigned by: Zheng J, Wittouck S, Salvetti E, Franz CMAP, Harris HMB, Mattarelli P, O'Toole PW, Pot B, Vandamme P, Walter J, et al. A taxonomic note on the genus Lactobacillus: Description of 23 novel genera, emended description of the genus Lactobacillus Beijerinck 1901, and union of Lactobacillaceae and Leuconostocaceae. Int J Syst Evol Microbiol 2020; 70:2782-2858. 🇮🇹

Linking: To permanently link to this page, use https://doi.org/10.83108/rn.10740Copy to clipboardLink copied to clipboard

Record number: 10740

• Previous versions:

  • Version	Date	JSON
    1	2026-03-31