Name: Alcaligenes ruhlandii (Packer and Vishniac 1955) Aragno and Schlegel 1977 (Approved Lists 1980)

Category: Species

Proposed as: comb. nov.

Basonym: "Hydrogenomonas ruhlandii" Packer and Vishniac 1955

Etymology: ruh.lan’di.i. N.L. gen. masc. n. ruhlandii, of Ruhland, named for the German microbiologist W. Ruhland, who studied the physiology of the hydrogen bacteria

Pronunciation, gender: ruh-LAN-di-i, masculine

Type strain: ATCC 15749; CCUG 38886; CIP 77.26; DSM 653; LMG 1866; VKM B-1333

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB010840 Analyse FASTA

Effective publication: Aragno M, Schlegel H. Alcaligenes ruhlandii (Packer and Vishniac) comb. nov., a peritrichous hydrogen bacterium previously assigned to Pseudomonas. International Journal of Systematic Bacteriology 1977; 27:279-281.

IJSEM list: Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Nomenclatural status: validly published under the ICNP

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

Correct name: Achromobacter ruhlandii (Packer and Vishniac 1955) Yabuuchi et al. 1998

Risk group: 2

• Synonyms:

  • Name	Kind
    Achromobacter ruhlandii (Packer and Vishniac 1955) Yabuuchi et al. 1998	homotypic synonym, validly published under the ICNP
    "Hydrogenomonas ruhlandii" Packer and Vishniac 1955	homotypic synonym, not validly published, basonym of name in Approved Lists

• Notes:
  • ❗ Alcaligenes ruhlandii 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 Alcaligenes.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 1". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 1, note = "PIIC". — 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 3 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.

Parent taxon: Alcaligenes Castellani and Chalmers 1919 (Approved Lists 1980)

Assigned by: Aragno M, Schlegel H. Alcaligenes ruhlandii (Packer and Vishniac) comb. nov., a peritrichous hydrogen bacterium previously assigned to Pseudomonas. International Journal of Systematic Bacteriology 1977; 27:279-281.

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Record number: 773021