Name: Diplorickettsia massiliensis Mediannikov et al. 2011

Category: Species

Proposed as: sp. nov.

Etymology: mas.si.li.en’sis. L. fem. adj. massiliensis, from Massilia, the Latin name of Marseille, France, where the organism was first grown, identified and characterized

Pronunciation (Latin), gender: di-plo-rik-KETT-si-a mas-si-li-EN-sis, feminine

Type strain: 20B; CSUR P99; DSM 23381; URIELLA NHT 117

Conduct genome-based taxonomy at

16S rRNA gene: GQ857549 Analyse FASTA

Effective publication: Mediannikov O, Sekeyova Z, Birg ML, Raoult D. A novel obligate intracellular gamma-proteobacterium associated with ixodid ticks, Diplorickettsia massiliensis, Gen. Nov., Sp. Nov. PLoS One 2010; 5:e11478. 🇫🇷

IJSEM list: Euzeby JP. Validation list no. 141. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2011; 61:2025-2026.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym (and not recommended for medical use)

Correct name: Rickettsiella massiliensis (Mediannikov et al. 2011) Saini and Gupta 2021

Risk group: 1

• Synonyms:

  • Name	Kind
    Rickettsiella massiliensis (Mediannikov et al. 2011) Saini and Gupta 2021	homotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus Diplorickettsia Mediannikov et al. 2011. Publication: Mediannikov O, Sekeyova Z, Birg ML, Raoult D. A novel obligate intracellular gamma-proteobacterium associated with ixodid ticks, Diplorickettsia massiliensis, Gen. Nov., Sp. Nov. PLoS One 2010; 5:e11478. 🇫🇷
  • ❗ Diplorickettsia massiliensis is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Diplorickettsia.
  • 😷 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 8 times in PubMed until 2026-06-11.
  • 🙅 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as a synonym of 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 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. 🇬🇧
  • 🧍 In the species description (protologue) of the effective publication, the type strain DSM 23381 is erroneously cited as DSM 233381. The accession number CSUR P99 has been provided at the time of request for valid publication of the name. Publication: Euzeby JP. Validation list no. 141. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2011; 61:2025-2026.

Parent taxon: Diplorickettsia Mediannikov et al. 2011

Assigned by: Mediannikov O, Sekeyova Z, Birg ML, Raoult D. A novel obligate intracellular gamma-proteobacterium associated with ixodid ticks, Diplorickettsia massiliensis, Gen. Nov., Sp. Nov. PLoS One 2010; 5:e11478. 🇫🇷

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Record number: 789355