Name: Azospirillum brasilense corrig. Tarrand et al. 1979 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: bra.si.len’se. N.L. neut. adj. brasilense, pertaining to the country of Brazil, South America

Pronunciation (Latin), gender: a-zo-spi-RIL-lum bra-si-LEN-se, neuter

Type strain: ATCC 29145; DSM 1690; JCM 1224; LMG 13127; NBRC 102289; NRRL B-14647; sp. 7; VKM B-1547

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: GU256438 Analyse FASTA

Effective publication: Tarrand JJ, Krieg NR, Dobereiner J. A taxonomic study of the Spirillum lipoferum group, with descriptions of a new genus, Azospirillum gen. nov. and two species, Azospirillum lipoferum (Beijerinck) comb. nov. and Azospirillum brasilense sp. nov. Can J Microbiol 1978; 24:967-980.

IJSEM list: Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Synonyms:

  • Name	Kind
    Azospirillum brasiliense Tarrand et al. 1979 (Approved Lists 1980)	other spelling of name, inaccurate spelling
    Roseomonas fauriae Rihs et al. 1998	heterotypic synonym, validly published under the ICNP

• Emendations:
  • Hördt et al. 2020 Hordt A, Lopez MG, Meier-Kolthoff JP, Schleuning M, Weinhold LM, Tindall BJ, Gronow S, Kyrpides NC, Woyke T, Goker M. Analysis of 1,000+ Type-Strain Genomes Substantially Improves Taxonomic Classification of Alphaproteobacteria. Front Microbiol 2020; 11:468. 🇩🇪 Oren A, Garrity GM. List of changes in taxonomic opinion no. 32. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2020; 70:4061-4090.

• Notes:
  • ⏰ According to Helsel et al. (2006), this species is an earlier heterotypic synonym of Roseomonas fauriae Rihs et al. 1998. Publication: Helsel LO, Hollis DG, Steigerwalt AG, Levett PN. Reclassification of Roseomonas fauriae Rihs et al. 1998 as a later heterotypic synonym of Azospirillum brasilense Tarrand et al. 1979. Int J Syst Evol Microbiol 2006; 56:2753-2755. 🇨🇦
  • 🧬 The phylogenomic assignment score of this taxon is 0.08428 (N = 5).
  • 😷 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 2026-08-13. 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 1009 times in PubMed until 2026-06-11.
  • 🧍 According to Bartlett et al. (2022), no evidence of human infection was found for this species. Publication: Bartlett A, Padfield D, Lear L, Bendall R, Vos M. A comprehensive list of bacterial pathogens infecting humans. Microbiology (Reading) 2022; 168:0. 🇬🇧
  • 🧍 The original spelling of the specific epithet, brasiliense (sic), has been corrected by Hill et al. 1984 [1]. However, according to Graesse [2], the Latin name of the country is Brasilia and the specific epithet brasiliense was correct. Publication: Hill LR, Skerman VBD, Sneath PHA. Corrigenda to the Approved Lists of Bacterial Names edited for the International Committee on Systematic Bacteriology. Int. J. Syst. Bacteriol. 1984; 34:508-511. 🇬🇧

Parent taxon: Azospirillum Tarrand et al. 1979 (Approved Lists 1980)

Assigned by: Tarrand JJ, Krieg NR, Dobereiner J. A taxonomic study of the Spirillum lipoferum group, with descriptions of a new genus, Azospirillum gen. nov. and two species, Azospirillum lipoferum (Beijerinck) comb. nov. and Azospirillum brasilense sp. nov. Can J Microbiol 1978; 24:967-980.

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Record number: 773591