Name: Aeromonas hydrophila (Chester 1901) Stanier 1943 (Approved Lists 1980)

Category: Species

Proposed as: comb. nov.

Basonym: "Bacillus hydrophilus" Chester 1901

Etymology: hy.dro’phi.la. Gr. neut. n. hydôr, water; N.L. fem. adj. suff. -phila, friend, loving; from Gr. fem. adj. philê, loving; N.L. fem. adj. hydrophila, water-loving

Gender: feminine

Type strain: ATCC 7966; BCRC 13018; CCRC 13018; CCUG 14551; CDC 359-60; CIP 76.14; DSM 30187; HAMBI 1847; HAMBI 1973; IAM 12460; JCM 1027; LMG 12156; LMG 13439; LMG 2844; NBIMCC 8962; NCIB 9240; NCIMB 9240; NCTC 8049

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: X87271 Analyse FASTA

Effective publication: Stanier RY. A Note on the Taxonomy of Proteus Hydrophilus. J Bacteriol 1943; 46:213-214.

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: correct name (and explicitly recommended for medical use)

Risk group: 2

• Synonyms:

  • Name	Kind
    "Bacillus hydrophilus" Chester 1901	homotypic synonym, not validly published, basonym of name in Approved Lists

• Emendations:
  • Beaz-Hidalgo et al. 2013 Beaz-Hidalgo R, Martinez-Murcia A, Figueras MJ. Reclassification of Aeromonas hydrophila subsp. dhakensis Huys et al. 2002 and Aeromonas aquariorum Martinez-Murcia et al. 2008 as Aeromonas dhakensis sp. nov. comb nov. and emendation of the species Aeromonas hydrophila. Syst Appl Microbiol 2013; 36:171-176. Oren A, Garrity GM. List of changes in taxonomic opinion no. 21. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2015; 65:7-10.

• Notes:
  • 🥇 Nomenclatural type of the genus Aeromonas Stanier 1943 (Approved Lists 1980). Publication: Stanier RY. A Note on the Taxonomy of Proteus Hydrophilus. J Bacteriol 1943; 46:213-214.
  • 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 2, note = "anaerogenes: 2 human pathogen; default: 2 human and animal pathogen - biological class of risk animal: 2". — The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 2, note = "genomospecies 2: 1 Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 1; default: 2 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 Taiwan has been imported on 2024-11-03. The full classification is: risk group = 2, note = "P650 = v". — The risk group for United States has been imported on 2024-02-09. 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 5290 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 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 2022; 168:0.
  • 🧍 The strain CIP 57.50 = ATCC 7965= NCTC 7812 (a reference strain frequently used to assess antimicrobial susceptibilities, the sensitivity and specificity of PCR protocols and stress responses, among other assays), previously known as a strain of Aeromonas hydrophila, must be reclassified as a strain of Aeromonas salmonicida. Publication: Minana-Galbis D, Farfan M, Loren JG, Fuste MC. The reference strain Aeromonas hydrophicla CIP 57.50 should be reclassified as Aeromonas salmonicida CIP 57.50. Int J Syst Evol Microbiol 2010; 60:715-717.

Subdivision:

Number of child taxa with a validly published and correct name: 2
Number of child taxa with a validly published name, including synonyms: 5
Total number of child taxa: 5

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Aeromonas hydrophila subsp. anaerogenes Schubert 1964 (Approved Lists 1980)	validly published under the ICNP	synonym
    Aeromonas hydrophila subsp. dhakensis Huys et al. 2002	validly published under the ICNP	synonym
    Aeromonas hydrophila subsp. hydrophila (Chester 1901) Schubert 1964 (Approved Lists 1980)	validly published under the ICNP	correct name
    Aeromonas hydrophila subsp. proteolytica (Merkel et al. 1964) Schubert 1969 (Approved Lists 1980)	validly published under the ICNP	synonym
    Aeromonas hydrophila subsp. ranae Huys et al. 2003	validly published under the ICNP	correct name

Parent taxon: Aeromonas Stanier 1943 (Approved Lists 1980)

Assigned by: Stanier RY. A Note on the Taxonomy of Proteus Hydrophilus. J Bacteriol 1943; 46:213-214.

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Record number: 772900