Name: Bifidobacterium longum subsp. infantis (Reuter 1963) Mattarelli et al. 2008

Category: Subspecies

Proposed as: comb. nov.

Basonym: Bifidobacterium infantis Reuter 1963 (Approved Lists 1980)

Etymology: in.fan’tis. L. gen. masc./fem. n. infantis, of an infant

Gender: neuter

Type strain: ATCC 15697; BCRC 14602; BCRC 15416; CCRC 14602; CCRC 15416; CCUG 30512; CCUG 30512 B; CGMCC 1.1853; CGMCC 1.2202; CIP 64.67; DSM 20088; HAMBI 1374; HAMBI 555; HAMBI 574; JCM 1222; LMG 8811; NBIMCC 8822; NCAIM B.01821; NCDO 2205; NCFB 2205; NCIMB 702205; NCTC 11817; S12

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: KP326372 Analyse FASTA

Valid publication: Mattarelli P, Bonaparte C, Pot B, Biavati B. Proposal to reclassify the three biotypes of Bifidobacterium longum as three subspecies: Bifidobacterium longum subsp. longum subsp. nov., Bifidobacterium longum subsp. infantis comb. nov. and Bifidobacterium longum subsp. suis comb. nov. Int J Syst Evol Microbiol 2008; 58:767-772.

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 58, part 4 of the IJSEM. Int J Syst Evol Microbiol 2008; 58:1513-1514.

Nomenclatural status: validly published under the ICNP

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

Risk group: 1

• Synonyms:

  • Name	Kind
    Bifidobacterium infantis Reuter 1963 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP, distinct rank

• Notes:
  • 😷 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 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.

Parent taxon: Bifidobacterium longum Reuter 1963 (Approved Lists 1980)

Assigned by: Mattarelli P, Bonaparte C, Pot B, Biavati B. Proposal to reclassify the three biotypes of Bifidobacterium longum as three subspecies: Bifidobacterium longum subsp. longum subsp. nov., Bifidobacterium longum subsp. infantis comb. nov. and Bifidobacterium longum subsp. suis comb. nov. Int J Syst Evol Microbiol 2008; 58:767-772.

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Record number: 787283