Name: Ralstonia paucula Vandamme et al. 1999

Category: Species

Proposed as: sp. nov.

Etymology: pau’cu.la. L. fem. adj. paucula, rare, very few, to indicate that these strains only cause human infections sporadically

Pronunciation (Latin), gender: … PA͡U-ku-la, feminine

Type strain: ATCC 700817; CCUG 12507; CDC E6793; CIP 105943; DSM 17313; JCM 11286; LMG 3244

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: EU024165 Analyse FASTA

Valid publication: Vandamme P, Goris J, Coenye T, Hoste B, Janssens D, Kersters K, De Vos P, Falsen E. Assignment of Centers for Disease Control group IVc-2 to the genus Ralstonia as Ralstonia paucula sp. nov. Int J Syst Bacteriol 1999; 49:663-669. 🇧🇪

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 pauculus (Vandamme et al. 1999) Vandamme and Coenye 2004

Risk group: 2

• Synonyms:

  • Name	Kind
    Wautersia paucula (Vandamme et al. 1999) Vaneechoutte et al. 2004	homotypic synonym, validly published under the ICNP
    Cupriavidus pauculus (Vandamme 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 paucula 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 Belgium has been imported on 2024-02-05. The full classification is: risk group = 2, note = "human pathogen". — 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 = 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.
  • 🎓 Name mentioned 11 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.
  • 🧍 Ralstonia paucula Vandamme et al. 1999 was previously known as CDC group IVc-2. 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. 🇫🇷

Parent taxon: Ralstonia Yabuuchi et al. 1996

Assigned by: Vandamme P, Goris J, Coenye T, Hoste B, Janssens D, Kersters K, De Vos P, Falsen E. Assignment of Centers for Disease Control group IVc-2 to the genus Ralstonia as Ralstonia paucula sp. nov. Int J Syst Bacteriol 1999; 49:663-669. 🇧🇪

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Record number: 780319