Name: Ralstonia syzygii (Roberts et al. 1990) Vaneechoutte et al. 2004

Category: Species

Proposed as: comb. nov.

Basonym: Pseudomonas syzygii Roberts et al. 1990

Etymology: sy.zy’gi.i. N.L. neut. n. Syzygium, generic name of the clove tree; N.L. gen. neut. n. syzygii, of the genus Syzygium

Pronunciation (Latin), gender: … sy-ZY-gi-i, feminine

Type strain: ATCC 49543; CCUG 32781; DSM 7385; ICMP 10915; LMG 10661; NCPPB 3446; R 001

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB021403 Analyse FASTA

Valid publication: Vaneechoutte M, Kampfer P, De Baere T, Falsen E, Verschraegen G. Wautersia gen. nov., a novel genus accommodating the phylogenetic lineage including Ralstonia eutropha and related species, and proposal of Ralstonia [Pseudomonas] syzygii (Roberts et al. 1990) comb. nov. Int J Syst Evol Microbiol 2004; 54:317-327. 🇧🇪

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 54, part 2 of the IJSEM. Int J Syst Evol Microbiol 2004; 54:1007-1009.

Nomenclatural status: validly published under the ICNP

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

Risk group: 1

• Synonyms:

  • Name	Kind
    Pseudomonas syzygii Roberts et al. 1990	homotypic synonym, validly published under the ICNP

• Emendations:
  • Safni et al. 2014 Safni I, Cleenwerck I, De Vos P, Fegan M, Sly L, Kappler U. Polyphasic taxonomic revision of the Ralstonia solanacearum species complex: proposal to emend the descriptions of Ralstonia solanacearum and Ralstonia syzygii and reclassify current R. syzygii strains as Ralstonia syzygii subsp. syzygii subsp. nov., R. solanacearum phylotype IV strains as Ralstonia syzygii subsp. indonesiensis subsp. nov., banana blood disease bacterium strains as Ralstonia syzygii subsp. celebesensis subsp. nov. and R. solanacearum phylotype I and III strains as Ralstonia pseudosolanacearum sp. nov. Int J Syst Evol Microbiol 2014; 64:3087-3103. 🇦🇺 Oren A, Garrity GM. Notification list. Notification that new names and new combinations have appeared in volume 64, part 9 of the IJSEM. Int J Syst Evol Microbiol 2014; 64:3923-3925.

• Notes:
  • 😩 Deposit incorrectly indicated in some sources as representing the type strain of this taxon: ATCC 49453.
  • 😷 The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1, note = "p2". — 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 22 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 risk group of the genus.
  • 🧍 In the paper by Vaneechoutte et al. 2004, the strain ATCC 49543 is erroneously cited as ATCC 49453. Publication: Euzeby JP. List of Bacterial Names with Standing in Nomenclature: a folder available on the Internet. Int J Syst Bacteriol 1997; 47:590-592. 🇫🇷
  • 🧍 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. 🇺🇸

Subdivision:

Number of child taxa with a validly published and correct name: 3
Number of child taxa with a validly published name, including synonyms: 3
Total number of child taxa: 3

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Ralstonia syzygii subsp. celebesensis Safni et al. 2014	validly published under the ICNP	correct name
    Ralstonia syzygii subsp. indonesiensis Safni et al. 2014	validly published under the ICNP	correct name
    Ralstonia syzygii subsp. syzygii (Roberts et al. 1990) Safni et al. 2014	validly published under the ICNP	correct name

Parent taxon: Ralstonia Yabuuchi et al. 1996

Assigned by: Vaneechoutte M, Kampfer P, De Baere T, Falsen E, Verschraegen G. Wautersia gen. nov., a novel genus accommodating the phylogenetic lineage including Ralstonia eutropha and related species, and proposal of Ralstonia [Pseudomonas] syzygii (Roberts et al. 1990) comb. nov. Int J Syst Evol Microbiol 2004; 54:317-327. 🇧🇪

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Record number: 780323