Name: Alcaligenes piechaudii Kiredjian et al. 1986

Category: Species

Proposed as: sp. nov.

Etymology: pie.chau’di.i. N.L. gen. masc. n. piechaudii, of Piechaud, to honor M. Piechaud, a bacteriologist at the Institut Pasteur, Paris, France

Pronunciation, gender: pie-K^HA͡U-di-i, masculine

Type strain: ATCC 43552; CCUG 724; CIP 60.75; DSM 10342; Hugh 366-5; IAM 12591; JCM 20668; LMG 1873; NBRC 102461; NCTC 11970

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB681803 Analyse FASTA

Valid publication: Kiredjian M, Holmes B, Kersters K, Guilvout I, De Ley J. Alcaligenes piechaudii, a new species from human clinical specimens and the environment. Int. J. Syst. Bacteriol. 1986; 36:282-287.

Nomenclatural status: validly published under the ICNP

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

Correct name: Achromobacter piechaudii (Kiredjian et al. 1986) Yabuuchi et al. 1998

Risk group: 2

• Synonyms:

  • Name	Kind
    Achromobacter piechaudii (Kiredjian et al. 1986) Yabuuchi et al. 1998	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Alcaligenes piechaudii 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 = 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 Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 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 13 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: Alcaligenes Castellani and Chalmers 1919 (Approved Lists 1980)

Assigned by: Kiredjian M, Holmes B, Kersters K, Guilvout I, De Ley J. Alcaligenes piechaudii, a new species from human clinical specimens and the environment. Int. J. Syst. Bacteriol. 1986; 36:282-287.

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Record number: 773020