Name: Lactobacillus paracasei subsp. paracasei Collins et al. 1989

Category: Subspecies

Proposed as: subsp. nov.

Etymology: pa.ra.ca’se.i. Gr. prep. para, resembling; L. gen. neut. n. casei, a specific epithet; N.L. gen. neut. n. paracasei, resembling Lactobacillus casei

Gender: masculine

Type strain: ATCC 25302; CCUG 32212; CIP 103918; DSM 20008; DSM 20020; DSM 5622; IFO 15889; JCM 8130; LMG 13087; NBIMCC 8458; NBRC 15889; NCDO 151; NCFB 151; NCIMB 700151

See detailed strain information at

Valid 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.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Lacticaseibacillus paracasei subsp. paracasei (Collins et al. 1989) Zheng et al. 2020

Risk group: 1

• Synonyms:

  • Name	Kind
    Lacticaseibacillus paracasei subsp. paracasei (Collins et al. 1989) Zheng et al. 2020	homotypic synonym, validly published under the ICNP

• Notes:
  • 🙋 This subspecies could be automatically created (rule 40d) by the valid publication of Lactobacillus paracasei subsp. tolerans (Abo-Elnaga and Kandler 1965) Collins et al. 1989 but an explicit description was also provided. 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.
  • ❗ Lactobacillus paracasei subsp. paracasei 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 paracasei 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. — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1, note = "+". — 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.
  • 🧍 See the file Some problems with Lactobacillus casei, Lactobacillus paracasei and Lactobacillus zeae. — The taxon Lactobacillus paracasei subsp. paracasei Collins et al. 1989, encompasses the type strain of Lactobacillus casei subsp. alactosus Mills and Lessel 1973 (Approved Lists 1980) and the type strain of Lactobacillus casei subsp. pseudoplantarum Abo-Elnaga and Kandler 1965 (Approved Lists 1980). Publication: Hansen PA, Lessel EF. Lactobacillus casei (Orla Jensen) comb. nov. International Journal of Systematic Bacteriology 1971; 21:69-71.
  • 🧍 The type strain of Lactobacillus casei subsp. alactosus is transferred in the subspecies Lactobacillus paracasei subsp. paracasei. So, according to Rule 37a, the name Lactobacillus casei subsp. alactosus must be changed to Lactobacillus paracasei subsp. paracasei. — 🧍 The type strain of Lactobacillus casei subsp. pseudoplantarum is transferred in the subspecies Lactobacillus paracasei subsp. paracasei. So, according to Rule 37a, the name Lactobacillus casei subsp. pseudoplantarum must be changed to Lactobacillus paracasei subsp. paracasei. Publication: Oren A, Arahal DR, Goker M, Moore ERB, Rossello-Mora R, Sutcliffe IC. International Code of Nomenclature of Prokaryotes. Prokaryotic Code (2022 Revision). Int J Syst Evol Microbiol 2023; 73:5585.

Parent taxon: Lactobacillus paracasei Collins et al. 1989

Assigned by: 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.

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Record number: 777362