Name: "Prescottia equi" (Magnusson 1923) Jones et al. 2013

Category: Species

Proposed as: comb. nov.

Basonym: Corynebacterium equi Magnusson 1923 (Approved Lists 1980)

Etymology: e’qui. L. masc. n. equus, horse; L. gen. masc. n. equi, of the horse

Gender: feminine

Nomenclatural type: 25729; ATCC 25729; ATCC 6939; C 7; CCUG 892; CECT 555; CIP 54.72; DSM 20307; HAMBI 2061; IFO 14956; JCM 1311; JCM 3209; LMG 18452; NBIMCC 1230; NBRC 101255; NBRC 14956; NCTC 1621; NRRL B-16538; VKM Ac-953

Conduct genome-based taxonomy at

16S rRNA gene: AF490539 Analyse FASTA

Original publication: Jones AL, Sutcliffe IC, Goodfellow M. Prescottia equi gen. nov., comb. nov.: a new home for an old pathogen. Antonie Van Leeuwenhoek 2013; 103:655-671.

Nomenclatural status: not validly published

Taxonomic status: synonym (and no standing)

Correct name: Rhodococcus equi (Magnusson 1923) Goodfellow and Alderson 1977 (Approved Lists 1980)

Risk group: 2

• Synonyms:

  • Name	Kind
    "Prescottella equi" (Magnusson 1923) Jones et al. 2013	homotypic synonym, not validly published
    Nocardia restricta (Turfitt 1944) McClung 1974 (Approved Lists 1980)	heterotypic synonym, validly published under the ICNP
    Corynebacterium equi Magnusson 1923 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP
    Prescottella equi (Magnusson 1923) Sangal et al. 2022	homotypic synonym, validly published under the ICNP
    Rhodococcus equi (Magnusson 1923) Goodfellow and Alderson 1977 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP
    "Proactinomyces restrictus" Turfitt 1944	heterotypic synonym, not validly published, basonym of name in Approved Lists

• Notes:
  • 🥇 Nomenclatural type of the genus "Prescottia" Jones et al. 2013. Publication: Jones AL, Sutcliffe IC, Goodfellow M. Prescottia equi gen. nov., comb. nov.: a new home for an old pathogen. Antonie Van Leeuwenhoek 2013; 103:655-671.
  • ⏲ According to Kaempfer et al. (2014), this species is a later heterotypic synonym of "Bacillus hoagii" Morse 1912 but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Kampfer P, Dott W, Martin K, Glaeser SP. Rhodococcus defluvii sp. nov., isolated from wastewater of a bioreactor and formal proposal to reclassify [Corynebacterium hoagii] and Rhodococcus equi as Rhodococcus hoagii comb. nov. Int J Syst Evol Microbiol 2014; 64:755-761.
  • ⏲ According to Kaempfer et al. (2014), this species is a later heterotypic synonym of Corynebacterium hoagii (Morse 1912) Eberson 1918 (Approved Lists 1980) but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Kampfer P, Dott W, Martin K, Glaeser SP. Rhodococcus defluvii sp. nov., isolated from wastewater of a bioreactor and formal proposal to reclassify [Corynebacterium hoagii] and Rhodococcus equi as Rhodococcus hoagii comb. nov. Int J Syst Evol Microbiol 2014; 64:755-761.
  • ⏲ According to Kaempfer et al. (2014), this species is a later heterotypic synonym of Rhodococcus hoagii (Morse 1912) Kämpfer et al. 2014 but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Kampfer P, Dott W, Martin K, Glaeser SP. Rhodococcus defluvii sp. nov., isolated from wastewater of a bioreactor and formal proposal to reclassify [Corynebacterium hoagii] and Rhodococcus equi as Rhodococcus hoagii comb. nov. Int J Syst Evol Microbiol 2014; 64:755-761.
  • ⏲ According to Nouioui et al. (2018), this species is a later heterotypic synonym of "Bacillus hoagii" Morse 1912 but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007.
  • ⏲ According to Nouioui et al. (2018), this species is a later heterotypic synonym of Corynebacterium hoagii (Morse 1912) Eberson 1918 (Approved Lists 1980) but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007.
  • ⏲ According to Nouioui et al. (2018), this species is a later heterotypic synonym of Rhodococcus hoagii (Morse 1912) Kämpfer et al. 2014 but this is in conflict with the rules of the International Code of Nomenclature of Prokaryotes. Publication: Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007.
  • ⏰ According to Rainey et al. (1995), this species is an earlier heterotypic synonym of "Proactinomyces restrictus" Turfitt 1944. Publication: Rainey FA, Burghardt J, Kroppenstedt R, Klatte S, Stackebrandt E. Polyphasic evidence for the transfer of Rhodococcus roseus to Rhodococcus rhodochrous. Int. J. Syst. Bacteriol. 1995; 45:101-103.
  • ⏰ According to Rainey et al. (1995), this species is an earlier heterotypic synonym of Nocardia restricta (Turfitt 1944) McClung 1974 (Approved Lists 1980). Publication: Rainey FA, Burghardt J, Kroppenstedt R, Klatte S, Stackebrandt E. Polyphasic evidence for the transfer of Rhodococcus roseus to Rhodococcus rhodochrous. Int. J. Syst. Bacteriol. 1995; 45:101-103.
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Garrity GM. List of changes in taxonomic opinion no. 29. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2019; 69:13-32.
  • 😷 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". — 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.
  • 🧍 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.
  • 🧍 The name "Prescottia equi" (Magnusson 1923) Jones et al. 2013 is illegitimate and replaced by the name "Prescottella equi" (Magnusson 1923) Jones et al. 2013. Publication: Jones AL, Sutcliffe IC, Goodfellow M. Proposal to replace the illegitimate genus name Prescottia Jones et al. 2013 with the genus name Prescottella gen. nov. and to replace the illegitimate combination Prescottia equi Jones et al. 2013 with Prescottella equi comb. nov. Antonie Van Leeuwenhoek 2013; 103:1405-1407.

Parent taxon: "Prescottia" Jones et al. 2013

Assigned by: Jones AL, Sutcliffe IC, Goodfellow M. Prescottia equi gen. nov., comb. nov.: a new home for an old pathogen. Antonie Van Leeuwenhoek 2013; 103:655-671.

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Record number: 790628