Name: Porphyromonas somerae Summanen et al. 2006

Category: Species

Proposed as: sp. nov.

Etymology: so’mer.ae. N.L. gen. fem. n. somerae, of Somer, in honor of the Finnish microbiologist Hannele Jousimies-Somer, who has contributed significantly to our knowledge of pigmented anaerobic Gram-negative rods and to the identification of clinically important anaerobic bacteria in general

Gender: feminine

Type strain: ATCC BAA-1230; CCUG 51464; DSM 23386; JCM 13867; WAL 6690

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB547667 Analyse FASTA

Effective publication: Summanen PH, Durmaz B, Vaisanen ML, Liu C, Molitoris D, Eerola E, Helander IM, Finegold SM. Porphyromonas somerae sp. nov., a pathogen isolated from humans and distinct from porphyromonas levii. J Clin Microbiol 2005; 43:4455-4459.

IJSEM list: Euzeby JP. Validation list no. 109. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2006; 56:925-927.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 2

• 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 genome of the type strain was sequenced as part of the GEBA (Genomic Encyclopedia of Bacteria and Archaea) project.

• Notes:
  • 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 2, note = "human pathogen". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 2.
  • 🎓 Name mentioned 13 times in PubMed until 2024-03-27.
  • 🧍 According to Bartlett et al. (2022), this species is an established human pathogen. Publication: Bartlett A, Padfield D, Lear L, Bendall R, Vos M. A comprehensive list of bacterial pathogens infecting humans. Microbiology 2022; 168:0.
  • 🧍 The culture collection accession numbers ATCC BAA-1230 and CCUG 51464 have been provided on request for validation. Publication: Euzeby JP. Validation list no. 109. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2006; 56:925-927.

Parent taxon: Porphyromonas Shah and Collins 1988

Assigned by: Summanen PH, Durmaz B, Vaisanen ML, Liu C, Molitoris D, Eerola E, Helander IM, Finegold SM. Porphyromonas somerae sp. nov., a pathogen isolated from humans and distinct from porphyromonas levii. J Clin Microbiol 2005; 43:4455-4459.

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Record number: 784671