Name: Parabacteroides johnsonii Sakamoto et al. 2007

Category: Species

Proposed as: sp. nov.

Etymology: john.so’ni.i. N.L. gen. masc. n. johnsonii, of Johnson, named after the American molecular taxonomist John L. Johnson, who was the first to describe Bacteroides merdae (Parabacteroides merdae)

Pronunciation, gender: john-SO-ni-i, masculine

Type strain: DSM 18315; JCM 13406; M-165

Conduct genome-based taxonomy at

16S rRNA gene: AB261128 Analyse FASTA

Valid publication: Sakamoto M, Kitahara M, Benno Y. Parabacteroides johnsonii sp. nov., isolated from human faeces. Int J Syst Evol Microbiol 2007; 57:293-296.

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 57, part 2 of the IJSEM. Int J Syst Evol Microbiol 2007; 57:898-899.

Nomenclatural status: validly published under the ICNP

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

Risk group: 1

• Emendations:
  • Hahnke et al. 2016 Hahnke RL, Meier-Kolthoff JP, Garcia-Lopez M, Mukherjee S, Huntemann M, Ivanova NN, Woyke T, Kyrpides NC, Klenk HP, Goker M. Genome-Based Taxonomic Classification of Bacteroidetes. Front Microbiol 2016; 7:2003. Oren A, Garrity GM. List of changes in taxonomic opinion no. 26. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2017; 67:2081-2086.

• 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.
  • 🎓 Name mentioned 12 times in PubMed until 2025-06-04.
  • 🙆 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 other species in the genus.
  • 🧍 The phylogenetic position of this species was determined in a genome-scale analysis by García-López et al. (2019). Publication: Garcia-Lopez M, Meier-Kolthoff JP, Tindall BJ, Gronow S, Woyke T, Kyrpides NC, Hahnke RL, Goker M. Analysis of 1,000 Type-Strain Genomes Improves Taxonomic Classification of Bacteroidetes. Front Microbiol 2019; 10:2083.

Parent taxon: Parabacteroides Sakamoto and Benno 2006

Assigned by: Sakamoto M, Kitahara M, Benno Y. Parabacteroides johnsonii sp. nov., isolated from human faeces. Int J Syst Evol Microbiol 2007; 57:293-296.

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Record number: 785951