Name: Megasphaera cerevisiae Engelmann and Weiss 1986

Category: Species

Proposed as: sp. nov.

Etymology: ce.re.vi’si.ae. L. fem. n. cerevisia, beer; L. gen. fem. n. cerevisiae, of beer

Gender: feminine

Type strain: ATCC 43254; DSM 20462; JCM 6130; PAT 1

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB609706 Analyse FASTA

Effective publication: Engelmann U, Weiss N. Megasphaera cerevisiae sp. nov.: a new gram-negative obligately anaerobic coccus isolated from spoiled beer. Syst. Appl. Microbiol. 1985; 6:287-290.

IJSEM list: Anonymous. Validation list no. 20. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1986; 36:354-356.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Notes:
  • 😷 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 2023-10-29. The full classification is: risk group = 1.
  • 🎓 Name mentioned 12 times in PubMed until 2024-03-28.
  • 🧍 The genome of the type strain was sequenced as part of the GEBA (Genomic Encyclopedia of Bacteria and Archaea) project. Publication: Mukherjee S, Seshadri R, Varghese NJ, Eloe-Fadrosh EA, Meier-Kolthoff JP, Goker M, Coates RC, Hadjithomas M, Pavlopoulos GA, Paez-Espino D, et al. 1,003 reference genomes of bacterial and archaeal isolates expand coverage of the tree of life. Nat Biotechnol 2017; 35:676-683.

Parent taxon: Megasphaera Rogosa 1971 (Approved Lists 1980)

Assigned by: Engelmann U, Weiss N. Megasphaera cerevisiae sp. nov.: a new gram-negative obligately anaerobic coccus isolated from spoiled beer. Syst. Appl. Microbiol. 1985; 6:287-290.

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Record number: 777745