Name: Lawsonia McOrist et al. 1995

Category: Genus

Proposed as: gen. nov.

Etymology: Law.so’ni.a. N.L. fem. n. Lawsonia, named after Gordon H.K. Lawson, the Scottish veterinarian who first recognized the organism causing porcine proliferative enteropathy

Gender, pronunciation: feminine (stem: Lawsoni-), law-SO-ni-a

Type species: Lawsonia intracellularis McOrist et al. 1995

16S rRNA gene: Analyse FASTA

Valid publication: McOrist S, Gebhart CJ, Boid R, Barns SM. Characterization of Lawsonia intracellularis gen. nov., sp. nov., the obligately intracellular bacterium of porcine proliferative enteropathy. Int J Syst Bacteriol 1995; 45:820-825.

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 45, part 4 of the IJSB. Int J Syst Bacteriol 1996; 46:364-365.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Synonyms:

  • Name	Kind
    "Candidatus Lawsonia" corrig. Gebhart et al. 1993	homotypic synonym, pro-validly published under the ICNP
    "Candidatus " Gebhart et al. 1993	homotypic synonym, inaccurate spelling

• Notes:
  • 🧕 Waite et al. (2020) assigned this genus to the class Desulfovibrionia Waite et al. 2020. Publication: Waite DW, Chuvochina M, Pelikan C, Parks DH, Yilmaz P, Wagner M, Loy A, Naganuma T, Nakai R, Whitman WB, et al. Proposal to reclassify the proteobacterial classes Deltaproteobacteria and Oligoflexia, and the phylum Thermodesulfobacteria into four phyla reflecting major functional capabilities. Int J Syst Evol Microbiol 2020; 70:5972-6016.
  • 🚋 The type species of this genus has alternatively been placed in the genus "Candidatus Lawsonia" corrig. Gebhart et al. 1993. Publication: Gebhart CJ, Barns SM, McOrist S, Lin GF, Lawson GH. Ileal symbiont intracellularis, an obligate intracellular bacterium of porcine intestines showing a relationship to Desulfovibrio species. Int J Syst Bacteriol 1993; 43:533-538.
  • 🙄 This taxon name is occasionally misprinted (or affected by an OCR error) in some sources as: "Lawsona"; "Lawsonla"; "Lawsonta"; "Luwsoniu"; "Vawsonia".
  • 🎰 The BRCs most frequently used for deposits in this group are: NCTC: 1.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, 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". — 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 Shipunov (2011), this name is a hemihomonym. Publication: Shipunov A. The problem of hemihomonyms and the on-line hemihomonyms database (HHDB). Bionomina 2011; 4:65-72.
  • 🧍 Lawsonia McOrist et al. 1995 is a later homonym of a genus name with standing in the botanical (plant) nomenclature: Lawsonia L. 1753. Lawsonia McOrist et al. 1995 is also a later homonym of a genus name with standing in the zoological (animal) nomenclature: Lawsonia Sharp, 1873. Principle 2 of the 2008 Code is not retroactive, so the name does not contravene the Code because of this homonymy. — Crook M. Personal communication, 2021-08-19.

Subdivision:

Number of child taxa with a validly published and correct name: 1
Number of child taxa with a validly published name, including synonyms: 1
Total number of child taxa: 1

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Lawsonia intracellularis McOrist et al. 1995	validly published under the ICNP	correct name

Parent taxon: Desulfovibrionaceae Kuever et al. 2006

Assigned by: Kuever J, Rainey FA, Widdel F. Family I. Desulfovibrionaceae fam. nov. In: Brenner DJ, Krieg NR, Staley JT, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 2 (The Proteobacteria), part C (The Alpha-, Beta-, Delta-, and Epsilonproteobacteria), Springer, New York, 2005, p. 926.

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Record number: 517266