Name: Haematobacter massiliensis (Greub and Raoult 2006) Helsel et al. 2007

Category: Species

Proposed as: comb. nov.

Basonym: Rhodobacter massiliensis Greub and Raoult 2006

Etymology: mas.si.li.en’sis. L. masc. adj. massiliensis, pertaining to Massilia (Roman name for Marseille) where the type strain was isolated

Pronunciation (Latin), gender: ha͡e-ma-to-BAK-ter mas-si-li-EN-sis, masculine

Type strain: CCUG 47968; CIP 107725; Framboise

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AF452106 Analyse FASTA

Effective publication: Helsel LO, Hollis D, Steigerwalt AG, Morey RE, Jordan J, Aye T, Radosevic J, Jannat-Khah D, Thiry D, Lonsway DR, et al. Identification of "Haematobacter," a new genus of aerobic Gram-negative rods isolated from clinical specimens, and reclassification of Rhodobacter massiliensis as "Haematobacter massiliensis comb. nov.". J Clin Microbiol 2007; 45:1238-1243. 🇺🇸

IJSEM list: Euzeby JP. Validation list no. 116. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2007; 57:1371-1373.

Nomenclatural status: validly published under the ICNP

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

Risk group: 1

• Synonyms:

  • Name	Kind
    Rhodobacter massiliensis Greub and Raoult 2006	homotypic synonym, validly published under the ICNP

• Emendations:
  • Hördt et al. 2020 Hordt A, Lopez MG, Meier-Kolthoff JP, Schleuning M, Weinhold LM, Tindall BJ, Gronow S, Kyrpides NC, Woyke T, Goker M. Analysis of 1,000+ Type-Strain Genomes Substantially Improves Taxonomic Classification of Alphaproteobacteria. Front Microbiol 2020; 11:468. 🇩🇪 Oren A, Garrity GM. List of changes in taxonomic opinion no. 32. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2020; 70:4061-4090.

• Notes:
  • 🧬 The phylogenomic assignment score of this taxon is 0.21855 (N = 39).
  • 😷 The risk group for Germany has been imported on 2026-08-13. 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.
  • 🎓 Name mentioned 5 times in PubMed until 2026-06-11.
  • 🙆 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 pathogenicity of the species itself.
  • 🧍 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 (Reading) 2022; 168:0. 🇬🇧
  • 🧍 According to the protologues Haematobacter massiliensis and Haematobacter missouriensis cannot be distinguished from one another. Publication: Euzeby JP. Validation list no. 116. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2007; 57:1371-1373.

Parent taxon: Haematobacter Helsel et al. 2007

Assigned by: Helsel LO, Hollis D, Steigerwalt AG, Morey RE, Jordan J, Aye T, Radosevic J, Jannat-Khah D, Thiry D, Lonsway DR, et al. Identification of "Haematobacter," a new genus of aerobic Gram-negative rods isolated from clinical specimens, and reclassification of Rhodobacter massiliensis as "Haematobacter massiliensis comb. nov.". J Clin Microbiol 2007; 45:1238-1243. 🇺🇸

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Record number: 786432