Species ***Actinomyces* *massiliensis***

Name: Actinomyces massiliensis Renvoise et al. 2009

Category: Species

Proposed as: sp. nov.

Etymology: mas.si.li.en’sis. L. masc. adj. massiliensis, of or belonging to Massilia, the old Greek and Roman name for Marseille, where the type strain was isolated

Pronunciation (Latin), gender: … mas-si-li-EN-sis, masculine

Type strain: 4401292; CCUG 53522; CSUR P18; DSM 23047; JCM 16130

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB545934 Analyse FASTA

Valid publication: Renvoise A, Raoult D, Roux V. Actinomyces massiliensis sp. nov., isolated from a patient blood culture. Int J Syst Evol Microbiol 2009; 59:540-544. 🇫🇷

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 59, part 3 of the IJSEM. Int J Syst Evol Microbiol 2009; 59:1259-1261.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

Emendations:
- Nouioui et al. 2018 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. 🇩🇪 Oren A, Garrity GM. List of changes in taxonomic opinion no. 29. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2019; 69:13-32.

Notes:
- 🧬 The phylogenomic assignment score of this taxon is 0.13566 (N = 12).
- 😷 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 9 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 the species itself.
- 🧍 According to Bartlett et al. (2022), this species is a putative human pathogen. Publication: Bartlett A, Padfield D, Lear L, Bendall R, Vos M. A comprehensive list of bacterial pathogens infecting humans. Microbiology (Reading) 2022; 168:0. 🇬🇧

Parent taxon: Actinomyces Harz 1877 (Approved Lists 1980)

Assigned by: Renvoise A, Raoult D, Roux V. Actinomyces massiliensis sp. nov., isolated from a patient blood culture. Int J Syst Evol Microbiol 2009; 59:540-544. 🇫🇷

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Record number: 787743

This LPSN page was printed on 2026-02-09 10:31:45

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Species Actinomyces massiliensis

Species ***Actinomyces* *massiliensis***