Name: Haemophilus piscium corrig. Snieszko et al. 1950 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: pis’ci.um. L. gen. masc. pl. n. piscium, of fishes

Gender: masculine

Type strain: ATCC 10801; CCUG 15943; CIP 106116; JCM 7872

See detailed strain information at

16S rRNA gene: JN175340 Analyse FASTA

Effective publication: Snieszko SF, Griffin PJ, Friddle SB. A new bacterium (Hemophilus piscium n. sp.) from ulcer disease of trout. J Bacteriol 1950; 59:699-710.

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
    Hemophilus piscium Snieszko et al. 1950 (Approved Lists 1980)	other spelling of name, inaccurate spelling

• Notes:
  • 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 1, note = "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 = "Human classification RG: not given - Animal classification RG: 2 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 2, note = "PV". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 2, note = "t". — 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 10 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 Ludwig et al. (2021), this "species is a true member of the genus Aeromonas and may be reclassified". Publication: Ludwig W, Viver T, Westram R, Francisco Gago J, Bustos-Caparros E, Knittel K, Amann R, Rossello-Mora R. Release LTP_12_2020, featuring a new ARB alignment and improved 16S rRNA tree for prokaryotic type strains. Syst Appl Microbiol 2021; 44:126218.
  • 🧍 Yarza et al. (2013) expected for accession JN175340, originating from the alleged type-strain deposit CIP 106116, an affiliation with Pasteurellaceae (Gammaproteobacteria) but observed an affiliation with Aeromonadaceae (Gammaproteobacteria) and 99.8% similarity against Aeromonas bestiarum. Publication: Yarza P, Sproer C, Swiderski J, Mrotzek N, Spring S, Tindall BJ, Gronow S, Pukall R, Klenk HP, Lang E, et al. Sequencing orphan species initiative (SOS): Filling the gaps in the 16S rRNA gene sequence database for all species with validly published names. Syst Appl Microbiol 2013; 36:69-73.
  • 🧍 According to De Ley et al. 1990 [3] this taxon belongs in the Aeromonadaceae Colwell et al. 1986. Publication: Kilian M. A taxonomic study of the genus Haemophilus, with the proposal of a new species. J Gen Microbiol 1976; 93:9-62.
  • 🧍 According to Kilian 1976 [1] and Broom and Sneath 1981 [2], Haemophilus piscium does not belong to the genus Haemophilus Winslow et al. 1917 (Approved Lists 1980). Publication: Euzéby JP. Corrigenda to the Approved Lists of Bacterial Names and to the amended edition of the Approved Lists of Bacterial Names. Int. J. Syst. Bacteriol. 1997; 47:1271-1272.
  • 🧍 According to Paterson et al. 1980 [4], Austin et al. 1998 [5] and Thornton et al. 1999 [6], Haemophilus piscium is, in fact, atypical Aeromonas salmonicida (Lehmann and Neumann 1896) Griffin et al. 1953 (Approved Lists 1980). Publication: Broom A, Sneath PH. Numerical taxonomy of Haemophilus. J Gen Microbiol 1981; 126:123-149.
  • 🧍 In the ATCC database and CCUG database, the type strain ATCC 10801 = CCUG 15943 is cited as a strain of Aeromonas salmonicida subsp. achromogenes (Smith 1963) Schubert 1967 (Approved Lists 1980). Publication: De Ley J, Mannheim W, Mutters R, Piechulla K, Tytgat R, Segers P, Bisgaard M, Frederiksen W, Hinz KH, Vanhoucke M. Inter- and intrafamilial similarities of rRNA cistrons of the Pasteurellaceae. Int J Syst Bacteriol 1990; 40:126-137.
  • 🧍 On the Approved Lists of Bacterial Names, this nomenclatural name is incorrectly cited as Haemophilus piscium Sniezko (sic) et al. 1950 [1]. This corrigendum has been omitted from the Approved Lists of Bacterial Names (Amended Edition) [2]. Publication: Hill LR, Skerman VBD, Sneath PHA. Corrigenda to the Approved Lists of Bacterial Names edited for the International Committee on Systematic Bacteriology. Int. J. Syst. Bacteriol. 1984; 34:508-511.

Parent taxon: Haemophilus corrig. Winslow et al. 1917 (Approved Lists 1980)

Assigned by: Snieszko SF, Griffin PJ, Friddle SB. A new bacterium (Hemophilus piscium n. sp.) from ulcer disease of trout. J Bacteriol 1950; 59:699-710.

Linking: To permanently link to this page, use https://lpsn.dsmz.de/species/haemophilus-pisciumCopy to clipboardLink copied to clipboard

Record number: 783945