Name: Alcaligenes faecalis subsp. parafaecalis Schroll et al. 2001

Category: Subspecies

Proposed as: subsp. nov.

Etymology: pa.ra.fae.ca’lis. Gr. prep. para, beside, alongside of, near, like; N.L. masc./fem. adj. faecalis, specific epithet; N.L. masc. adj. parafaecalis, intended to mean alongside of the species Alcaligenes faecalis

Pronunciation, gender: pa-ra-fa͡e-KA-lis, masculine

Type strain: CCUG 48316; CIP 106866; DSM 13975; DSM 3975; G

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AJ242986 Analyse FASTA

Effective publication: Schroll G, Busse HJ, Parrer G, Rolleke S, Lubitz W, Denner EB. Alcaligenes faecalis subsp. parafaecalis subsp. nov., a bacterium accumulating poly-beta-hydroxybutyrate from acetone-butanol bioprocess residues. Syst Appl Microbiol 2001; 24:37-43.

IJSEM list: Anonymous. Validation list no. 82. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2001; 51:1619-1620.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

• Synonyms:

  • Name	Kind
    Alcaligenes parafaecalis (Schroll et al. 2001) Machado et al. 2023	homotypic synonym, validly published under the ICNP, distinct rank

• Notes:
  • 😷 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 = 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.
  • 🙆 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as the name to be applied to this subspecies. The name is on LoRN because of the recorded risk group of the species itself.

Parent taxon: Alcaligenes faecalis Castellani and Chalmers 1919 (Approved Lists 1980)

Assigned by: Schroll G, Busse HJ, Parrer G, Rolleke S, Lubitz W, Denner EB. Alcaligenes faecalis subsp. parafaecalis subsp. nov., a bacterium accumulating poly-beta-hydroxybutyrate from acetone-butanol bioprocess residues. Syst Appl Microbiol 2001; 24:37-43.

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Record number: 773013