Name: Necropsobacter rosorum Christensen et al. 2011

Category: Species

Proposed as: sp. nov.

Etymology: ro.so’rum. L. gen. masc. n. rosoris, a rodent; L. gen. masc. pl. n. rosorum, of rodents

Pronunciation (Latin), gender: ne-krop-so-BAK-ter ro-SO-rum, masculine

Type strain: CCM 7802; CCUG 28028; CIP 110147; DSM 26409; Michel A/76; P709

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AF224303 Analyse FASTA

Valid publication: Christensen H, Korczak BM, Bojesen AM, Kuhnert P, Frederiksen W, Bisgaard M. Classification of organisms previously reported as the SP and Stewart-Letscher groups, with descriptions of Necropsobacter gen. nov. and of Necropsobacter rosorum sp. nov. for organisms of the SP group. Int J Syst Evol Microbiol 2011; 61:1829-1836. 🇩🇰

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 61, part 8 of the IJSEM. Int J Syst Evol Microbiol 2011; 61:2566-2567.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

• Notes:
  • 🥇 Nomenclatural type of the genus Necropsobacter Christensen et al. 2011. Publication: Christensen H, Korczak BM, Bojesen AM, Kuhnert P, Frederiksen W, Bisgaard M. Classification of organisms previously reported as the SP and Stewart-Letscher groups, with descriptions of Necropsobacter gen. nov. and of Necropsobacter rosorum sp. nov. for organisms of the SP group. Int J Syst Evol Microbiol 2011; 61:1829-1836. 🇩🇰
  • 😷 The risk group for Germany has been imported on 2026-08-13. The full classification is: risk group = 2, note = "Z". — 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 6 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 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. 🇬🇧
  • 🧍 Necropsobacter rosorum Christensen et al. 2011 was previously known as organisms of the SP-group (Frederiksen 1981), the name referring to an abbreviation for "Sektionsprotocol" (L. sectio, "an act of cutting", protocol, the original notes made on a necropsy, an experiment or on a case of diasease). Publication: Frederiksen W. Gas producing species within Pasteurella and Actinobacillus. In: Kilian M, Frederiksen W, Biberstein EL (eds), Haemophilus, Pasteurella and Actinobacillus, Academic Press, London, 1981, p. 185-196.

Parent taxon: Necropsobacter Christensen et al. 2011

Assigned by: Christensen H, Korczak BM, Bojesen AM, Kuhnert P, Frederiksen W, Bisgaard M. Classification of organisms previously reported as the SP and Stewart-Letscher groups, with descriptions of Necropsobacter gen. nov. and of Necropsobacter rosorum sp. nov. for organisms of the SP group. Int J Syst Evol Microbiol 2011; 61:1829-1836. 🇩🇰

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Record number: 789378