Name: Francisella opportunistica Dietrich et al. 2020

Category: Species

Proposed as: sp. nov.

Etymology: op.por.tu.nis’ti.ca. N.L. fem. adj. opportunistica, opportunistic, referring to the organism’s ability to opportunistically infect immunocompromised humans

Pronunciation, gender: op-por-tu-NIS-ti-ka, feminine

Type strain: ATCC BAA-2974; DSM 107100; PA05-1188

Conduct genome-based taxonomy at

16S rRNA gene: EU031811 Analyse FASTA

Valid publication: Dietrich EA, Kingry LC, Kugeler KJ, Levy C, Yaglom H, Young JW, Mead PS, Petersen JM. Francisella opportunistica sp. nov., isolated from human blood and cerebrospinal fluid. Int J Syst Evol Microbiol 2020; 70:1145-1151.

IJSEM list: Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 70, part 2 of the IJSEM. Int J Syst Evol Microbiol 2020; 70:2967-2971.

Nomenclatural status: validly published under the ICNP

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

• Synonyms:

  • Name	Kind
    "Francisella opportunistica" Challacombe et al. 2017	homotypic synonym, not validly published

• Notes:
  • 🎓 Name mentioned 2 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 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.

Parent taxon: Francisella Dorofeev 1947 (Approved Lists 1980)

Assigned by: Dietrich EA, Kingry LC, Kugeler KJ, Levy C, Yaglom H, Young JW, Mead PS, Petersen JM. Francisella opportunistica sp. nov., isolated from human blood and cerebrospinal fluid. Int J Syst Evol Microbiol 2020; 70:1145-1151.

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Record number: 5779