Name: Asaia siamensis Katsura et al. 2001

Category: Species

Proposed as: sp. nov.

Etymology: si.a.men’sis. N.L. n. Siam, old name of Thailand; L. masc./fem. adj. suff. -ensis, indicating geographical origin; N.L. fem. adj. siamensis, of or pertaining to Siam (Thailand), where the type strain was isolated

Pronunciation, gender: si-a-MEN-sis, feminine

Type strain: CCM 7132; DSM 15972; IFO 16457; JCM 10715; KCTC 12914; MTCC 4042; NBRC 16457; NRIC 323; S60-1

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB681065 Analyse FASTA

Valid publication: Katsura K, Kawasaki H, Potacharoen W, Saono S, Seki T, Yamada Y, Uchimura T, Komagata K. Asaia siamensis sp. nov., an acetic acid bacterium in the alpha-proteobacteria. Int J Syst Evol Microbiol 2001; 51:559-563.

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 51, part 2 of the IJSEM. Int J Syst Evol Microbiol 2001; 51:795-796.

Nomenclatural status: validly published under the ICNP

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

Risk group: 1

• Notes:
  • 😷 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 7 times in PubMed until 2025-06-04.
  • 🙆 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 pathogenicity of other species in the genus.
  • 🧍 According to Rules 27(3) and 30, this name is not validly published, because the original publication makes reference to the deposit of the type strain in a single recognized culture collection. However, according to the Judicial Opinion 81, Asaia siamensis Katsura et al. 2001 is considered to be validly published, since deposit in a second culture collection in a different country has been documented. Publication: Euzeby JP, Tindall BJ. Status of strains that contravene Rules 27(3) and 30 of the Bacteriological Code. Request for an opinion. Int J Syst Evol Microbiol 2004; 54:293-301.
  • 🧍 The specific epithet siamensis is a Neo Latin adjective, not a Neo Latin noun in the genitive case as cited by Katsura et al. 2001. Publication: Judicial Commission. Judicial Opinion No. 81. Int J Syst Evol Microbiol 2008; 58:1755-1763.

Parent taxon: Asaia Yamada et al. 2000

Assigned by: Katsura K, Kawasaki H, Potacharoen W, Saono S, Seki T, Yamada Y, Uchimura T, Komagata K. Asaia siamensis sp. nov., an acetic acid bacterium in the alpha-proteobacteria. Int J Syst Evol Microbiol 2001; 51:559-563.

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Record number: 773465