Name: Ralstonia gilardii Coenye et al. 1999

Category: Species

Proposed as: sp. nov.

Etymology: gi.lar’di.i. N.L. gen. masc. n. gilardii, in honour of G. L. Gilardi, an American microbiologist who contributed much to our knowledge of Alcaligenes species

Pronunciation, gender: gi-LAR-di-i, feminine

Type strain: 4325; API 141; API 141-2-84; ATCC 700815; CCUG 38401; CIP 105966; DSM 17292; Gilardi 4325; JCM 11283; LMG 5886

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AF076645 Analyse FASTA

Valid publication: Coenye T, Falsen E, Vancanneyt M, Hoste B, Govan JR, Kersters K, Vandamme P. Classification of Alcaligenes faecalis-like isolates from the environment and human clinical samples as Ralstonia gilardii sp. nov. Int J Syst Bacteriol 1999; 49:405-413. 🇧🇪

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 49, part 2 of the IJSB. Int J Syst Bacteriol 1999; 49:937-939.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym (and not recommended for medical use)

Correct name: Cupriavidus gilardii (Coenye et al. 1999) Vandamme and Coenye 2004

Risk group: 2

• Synonyms:

  • Name	Kind
    Wautersia gilardii (Coenye et al. 1999) Vaneechoutte et al. 2004	homotypic synonym, validly published under the ICNP
    Cupriavidus gilardii (Coenye et al. 1999) Vandamme and Coenye 2004	homotypic synonym, validly published under the ICNP

• Notes:
  • 📧 The e-mail address of the corresponding author given in the effective publication is not functional any more.
  • ❗ Ralstonia gilardii is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Ralstonia.
  • 😷 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 Germany has been imported on 2023-10-29. The full classification is: risk group = 1, note = "+". — 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 4 times in PubMed until 2025-06-04.
  • 🙅 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as a synonym of 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. 🇬🇧

Parent taxon: Ralstonia Yabuuchi et al. 1996

Assigned by: Coenye T, Falsen E, Vancanneyt M, Hoste B, Govan JR, Kersters K, Vandamme P. Classification of Alcaligenes faecalis-like isolates from the environment and human clinical samples as Ralstonia gilardii sp. nov. Int J Syst Bacteriol 1999; 49:405-413. 🇧🇪

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Record number: 780314