Name: Acetomicrobium flavidum Soutschek et al. 1985

Category: Species

Proposed as: sp. nov.

Etymology: fla’vi.dum. L. neut. adj. flavidum, yellowish

Pronunciation, gender: FLA-wi-dum, neuter

Type strain: ATCC 43122; DSM 20664; LMG 6941

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: FR733692 Analyse FASTA

Effective publication: Soutschek E, Winter J, Schindler F, Ihndler O. Acetomicrobium flavidum, gen. nov., sp. nov., a thermophilic, anaerobic bacterium from sewage sludge, forming acetate, CO2 and H2 from glucose. Syst. Appl. Microbiol. 1984; 5:377-390.

IJSEM list: Anonymous. Validation list no. 17. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1985; 35:223-225.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Notes:
  • 🥇 Nomenclatural type of the genus Acetomicrobium Soutschek et al. 1985. Publication: Soutschek E, Winter J, Schindler F, Ihndler O. Acetomicrobium flavidum, gen. nov., sp. nov., a thermophilic, anaerobic bacterium from sewage sludge, forming acetate, CO2 and H2 from glucose. Syst. Appl. Microbiol. 1984; 5:377-390.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 1". — 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 2023-10-29. 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 3 times in PubMed until 2025-06-04.
  • 🧍 Yarza et al. (2013) expected for accession FR733692, originating from the alleged type-strain deposit DSM 20664, an affiliation with Bacteroidaceae (Bacteroidetes) but observed an affiliation with a deep branch in domain Bacteria and 71% similarity against Bacteroides fragilis; 99.7% against Anaerobaculum mobile. 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. 🇩🇪
  • 🧍 The 16S rRNA gene sequence of the type strain shows an unexpected affiliation with a deep branch in domain Bacteria (99.7% against Anaerobaculum mobile; 71% similarity against Bacteroides fragilis). 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. 🇩🇪

Parent taxon: Acetomicrobium Soutschek et al. 1985

Assigned by: Soutschek E, Winter J, Schindler F, Ihndler O. Acetomicrobium flavidum, gen. nov., sp. nov., a thermophilic, anaerobic bacterium from sewage sludge, forming acetate, CO2 and H2 from glucose. Syst. Appl. Microbiol. 1984; 5:377-390.

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Record number: 772541