Name: Ewingella americana Grimont et al. 1984

Category: Species

Proposed as: sp. nov.

Etymology: a.me.ri.ca’na. N.L. fem. adj. americana, pertaining to America, to denote that the original 10 strains were isolated in the United States of America

Pronunciation (Latin), gender: e-win͡g-EL-la a-me-ri-KA-na, feminine

Type strain: ATCC 33852; CCUG 14506; CDC 1468-78; CIP 81.94; DSM 4580; JCM 5911; LMG 7869; NCTC 12157

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: JN175329 Analyse FASTA

Effective publication: Grimont PA, Farmer JJ, Grimont F, Asbury MA, Brenner DJ, Deval C. Ewingella americana gen.nov., sp.nov., a new Enterobacteriaceae isolated from clinical specimens. Ann Microbiol (Paris) 1983; 134A:39-52.

IJSEM list: Anonymous. Validation list no. 13. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1984; 34:91-92.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

• Notes:
  • 🥇 Nomenclatural type of the genus Ewingella Grimont et al. 1984. Publication: Grimont PA, Farmer JJ, Grimont F, Asbury MA, Brenner DJ, Deval C. Ewingella americana gen.nov., sp.nov., a new Enterobacteriaceae isolated from clinical specimens. Ann Microbiol (Paris) 1983; 134A:39-52.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 2, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 2". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 2. — The risk group for Germany has been imported on 2026-08-13. 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 61 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 risk group 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. 🇬🇧
  • 🧍 Plant pathogenic according to Bull et al. (2007). Publication: Bull CT, De Boer SH, Denny TP, Firrao G, Fischer Le Saux M, Saddler GS, Scortichini M, Stead DE, Takikawa Y. Comprehensive list of names of plant pathogenic bacteria, 1980-2007. Journal of Plant Pathology 2010; 92:551-592. 🇺🇸
  • 🧍 Ewingella americana Grimont et al. 1984 was previously known as CDC Enteric Group 40. Publication: Palleroni NJ. Genus I. Pseudomonas Migula 1894, 237 AL (Nom. Cons., Opin. 5 of the Jud. Comm. 1952, 121). In: Brenner DJ, Krieg NR, Staley JT, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, second edition, vol. (The Proteobacteria), part B (The Gammaproteobacteria), Springer, New York, 2005, p. 323-379. 🇺🇸

Parent taxon: Ewingella Grimont et al. 1984

Assigned by: Grimont PA, Farmer JJ, Grimont F, Asbury MA, Brenner DJ, Deval C. Ewingella americana gen.nov., sp.nov., a new Enterobacteriaceae isolated from clinical specimens. Ann Microbiol (Paris) 1983; 134A:39-52.

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Record number: 776130