Name: Bifidobacterium animalis subsp. lactis (Meile et al. 1997) Masco et al. 2004

Category: Subspecies

Proposed as: comb. nov.

Basonym: Bifidobacterium lactis Meile et al. 1997

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

Pronunciation, gender: LAK-tis, neuter

Type strain: CCUG 37979; CIP 105265; DSM 10140; JCM 10602; LMG 18314; UR1

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB050136 Analyse FASTA

Valid publication: Masco L, Ventura M, Zink R, Huys G, Swings J. Polyphasic taxonomic analysis of Bifidobacterium animalis and Bifidobacterium lactis reveals relatedness at the subspecies level: reclassification of Bifidobacterium animalis as Bifidobacterium animalis subsp. animalis subsp. nov. and Bifidobacterium lactis as Bifidobacterium animalis subsp. lactis subsp. nov. Int J Syst Evol Microbiol 2004; 54:1137-1143.

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 54, part 4 of the IJSEM. Int J Syst Evol Microbiol 2004; 54:1911-1913.

Nomenclatural status: validly published under the ICNP

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

Risk group: 1

• Synonyms:

  • Name	Kind
    Bifidobacterium lactis Meile et al. 1997	homotypic synonym, validly published under the ICNP, distinct rank

• Notes:
  • 🧬 The phylogenomic assignment score of this taxon is 0.15852 (N = 6).
  • 😷 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". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1. — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1. — 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.
  • 🙆 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as the name to be applied to this subspecies. The name is on LoRN because of the recorded risk group of the genus.
  • 🧍 The phylogenetic position of this subspecies was determined in a genome-scale analysis by Nouioui et al. (2018). Publication: Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007.
  • 🧍 In the paper by Masco et al. 2004, Bifidobacterium animalis subsp. lactis is cited as Bifidobacterium animalis subsp. lactis subsp. nov. Publication: Euzeby JP. List of Bacterial Names with Standing in Nomenclature: a folder available on the Internet. Int J Syst Bacteriol 1997; 47:590-592.

Parent taxon: Bifidobacterium animalis (Mitsuoka 1969) Scardovi and Trovatelli 1974 (Approved Lists 1980)

Assigned by: Masco L, Ventura M, Zink R, Huys G, Swings J. Polyphasic taxonomic analysis of Bifidobacterium animalis and Bifidobacterium lactis reveals relatedness at the subspecies level: reclassification of Bifidobacterium animalis as Bifidobacterium animalis subsp. animalis subsp. nov. and Bifidobacterium lactis as Bifidobacterium animalis subsp. lactis subsp. nov. Int J Syst Evol Microbiol 2004; 54:1137-1143.

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Record number: 774024