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. — 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 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