Name: Serratia marcescens subsp. sakuensis Ajithkumar et al. 2003

Category: Subspecies

Proposed as: subsp. nov.

Etymology: sa.ku.en’sis. N.L. fem. adj. sakuensis, referring to Saku, Nagano, Japan, where the strain was isolated

Pronunciation (Latin), gender: ser-RA-ti-a mar-KES-kens sa-ku-EN-sis, feminine

Type strain: CIP 107489; DSM 17174; JCM 11315; KRED

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB061685 Analyse FASTA

Valid publication: Ajithkumar B, Ajithkumar VP, Iriye R, Doi Y, Sakai T. Spore-forming Serratia marcescens subsp. sakuensis subsp. nov., isolated from a domestic wastewater treatment tank. Int J Syst Evol Microbiol 2003; 53:253-258. 🇯🇵

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 53, part 1 of the IJSEM. Int J Syst Evol Microbiol 2003; 53:629-630.

Nomenclatural status: validly published under the ICNP

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

Correct name: Serratia marcescens Bizio 1823 (Approved Lists 1980)

Risk group: 2

• Synonyms:

  • Name	Kind
    Serratia marcescens Bizio 1823 (Approved Lists 1980)	heterotypic synonym, validly published under the ICNP, distinct rank

• Notes:
  • 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Garrity GM. List of changes in taxonomic opinion no. 32. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2020; 70:4061-4090.
  • 📧 The e-mail address of the corresponding author given in the effective publication is not functional any more.
  • ❗ Serratia marcescens subsp. sakuensis is the correct name instead if this subspecies is regarded as a separate subspecies (i.e., if its nomenclatural type is not assigned to another subspecies whose name is validly published, legitimate and not rejected and has priority) within a separate species Serratia marcescens within a separate genus Serratia.
  • 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 2, note = "human and animal pathogen - biological class of risk animal: 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.
  • 🙅 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 subspecies. The name is on LoRN because of the recorded risk group of the species itself.
  • 🧍 According to the Subcommittee on the Taxonomy of Enterobacteriaceae, the presence of spores in Serratia marcescens subsp. sakuensis JCM 11315 is not confirmed. Publication: Holmes B, Farmer Iii JJ. International Committee on Systematics of Prokaryotes Subcommittee on the taxonomy of Enterobacteriaceae. Minutes of the meetings, 7 August 2008, Istanbul, Turkey. Int. J. Syst. Evol. Microbiol. 2009; 59:2643-2645. 🇬🇧

Parent taxon: Serratia marcescens Bizio 1823 (Approved Lists 1980)

Assigned by: Ajithkumar B, Ajithkumar VP, Iriye R, Doi Y, Sakai T. Spore-forming Serratia marcescens subsp. sakuensis subsp. nov., isolated from a domestic wastewater treatment tank. Int J Syst Evol Microbiol 2003; 53:253-258. 🇯🇵

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Record number: 780878