Name: Acidiphilium cryptum Harrison 1981

Category: Species

Proposed as: sp. nov.

Etymology: cryp’tum. N.L. neut. adj. cryptum, hidden; from Gr. neut. adj. krypton, hidden or secret

Pronunciation (Latin), gender: a-ki-di-P^HI-li-um KRYP-tum, neuter

Type strain: ATCC 33463; DSM 2389; IFO 14242; JCM 21277; Lhet2; NBRC 14242

See detailed strain information at

16S rRNA gene: D30773 Analyse FASTA

Valid publication: Harrison Jr. AP. Acidiphilium cryptum gen. nov., sp. nov., heterotrophic bacterium from acidic mineral environments. Int. J. Syst. Bacteriol. 1981; 31:327-332.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name (and explicitly recommended for medical use)

Risk group: 1

• Notes:
  • 🥇 Nomenclatural type of the genus Acidiphilium Harrison 1981. Publication: Harrison Jr. AP. Acidiphilium cryptum gen. nov., sp. nov., heterotrophic bacterium from acidic mineral environments. Int. J. Syst. Bacteriol. 1981; 31:327-332.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "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 = 1. — The risk group for Germany has been imported on 2026-08-13. The full classification is: risk group = 1. — 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 45 times in PubMed until 2026-06-11.
  • 🙆 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 other species in the genus.

Parent taxon: Acidiphilium Harrison 1981

Assigned by: Harrison Jr. AP. Acidiphilium cryptum gen. nov., sp. nov., heterotrophic bacterium from acidic mineral environments. Int. J. Syst. Bacteriol. 1981; 31:327-332.

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Record number: 772581