Name: Escherichia fergusonii Farmer et al. 1985

Category: Species

Proposed as: sp. nov.

Etymology: fer.gu.son’i.i. N.L. gen. masc. n. fergusonii, of Ferguson, named to honor the American microbiologist William W. Ferguson, who made many contributions to enteric bacteriology and was one of the first to show the role of certain strains of Escherichia coli in infantile diarrhea

Gender: feminine

Type strain: ATCC 35469; CDC 568-73; CIP 103357; CIP 104947; DSM 13698; JCM 21226; LMG 7866; NBRC 102419; NCTC 12128

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AF530475 Analyse FASTA

Effective publication: Farmer JJ, Fanning GR, Davis BR, O'Hara CM, Riddle C, Hickman-Brenner FW, Asbury MA, Lowery VA, Brenner DJ. Escherichia fergusonii and Enterobacter taylorae, two new species of Enterobacteriaceae isolated from clinical specimens. J Clin Microbiol 1985; 21:77-81.

IJSEM list: Anonymous. Validation list no. 17. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1985; 35:223-225.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 2

• Notes:
  • 🧬 The phylogenomic assignment score of this taxon is 0.00212 (N = 35).
  • 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 2, note = "human and animal pathogen - biological class of risk animal: 2". — The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 2, note = "Animal classification RG: 2 - 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 2023-10-29. The full classification is: risk group = 2, note = "ht".
  • 🎓 Name mentioned 148 times in PubMed until 2024-03-28.
  • 🧍 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 2022; 168:0.
  • 🧍 Escherichia fergusonii Farmer et al. 1985 was previously known as CDC Enteric Group 10. 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. 2 (The Proteobacteria), part B (The Gammaproteobacteria), Springer, New York, 2005, p. 323-379.

Parent taxon: Escherichia Castellani and Chalmers 1919 (Approved Lists 1980)

Assigned by: Farmer JJ, Fanning GR, Davis BR, O'Hara CM, Riddle C, Hickman-Brenner FW, Asbury MA, Lowery VA, Brenner DJ. Escherichia fergusonii and Enterobacter taylorae, two new species of Enterobacteriaceae isolated from clinical specimens. J Clin Microbiol 1985; 21:77-81.

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Record number: 776059