Name: Xanthomonas euvesicatoria Jones et al. 2006

Category: Species

Proposed as: sp. nov.

Etymology: eu.ve.si.ca.to.ri.a. Gr. adv. eû, well; L. fem. n. vesica, a blister; N.L. fem. adj. vesicatoria, causing a blister; N.L. fem. adj. euvesicatoria, intended to show that this bacterial species is most similar to the strains originally identified by E. M. Doidge 1921, which she designated Bacterium vesicatorium

Gender: feminine

Type strain: ATCC 11633; DSM 19128; ICMP 109; ICMP 98; LMG 27970; NBIMCC 8731; NCPPB 2968

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: KU301881 Analyse FASTA

Effective publication: Jones JB, Lacy GH, Bouzar H, Stall RE, Schaad NW. Reclassification of the xanthomonads associated with bacterial spot disease of tomato and pepper. Syst Appl Microbiol 2004; 27:755-762.

IJSEM list: Euzeby JP. Validation list no. 109. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2006; 56:925-927.

Nomenclatural status: validly published under the ICNP

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

Risk group: 1

• Synonyms:

  • Name	Kind
    Xanthomonas perforans Jones et al. 2006	heterotypic synonym, validly published under the ICNP
    Xanthomonas alfalfae (ex Riker et al. 1935) Schaad et al. 2007	heterotypic synonym, validly published under the ICNP

• Emendations:
  • Constantin et al. 2016 Constantin EC, Cleenwerck I, Maes M, Baeyen S, et al. Genetic characterization of strains named as Xanthomonas axonopodis pv. dieffenbachiae leads to a taxonomic revision of the X. axonopodis species complex. Plant Pathol 2016; 65:792-806. Oren A, Garrity GM. List of changes in taxonomic opinion no. 26. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2017; 67:2081-2086.
    Notes:
    • 🫂 Emendation accompanied by 2 proposals regarding the synonymy of the species.
  • Harrison et al. 2023 Harrison J, Hussain RMF, Aspin A, Grant MR, Vicente JG, et al. Phylogenomic analysis supports the transfer of 20 pathovars from Xanthomonas campestris into Xanthomonas euvescatoria. Taxonomy 2023; 3:29-45. Oren A, Göker M. List of changes in taxonomic opinion no. 41. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2025; 75:6561.

• Notes:
  • ⏰ According to Constantin et al. (2016), this species is an earlier heterotypic synonym of Xanthomonas alfalfae (ex Riker et al. 1935) Schaad et al. 2007. Publication: Constantin EC, Cleenwerck I, Maes M, Baeyen S, et al. Genetic characterization of strains named as Xanthomonas axonopodis pv. dieffenbachiae leads to a taxonomic revision of the X. axonopodis species complex. Plant Pathol 2016; 65:792-806.
  • ⏰ According to Constantin et al. (2016), this species is an earlier heterotypic synonym of Xanthomonas perforans Jones et al. 2006. Publication: Constantin EC, Cleenwerck I, Maes M, Baeyen S, et al. Genetic characterization of strains named as Xanthomonas axonopodis pv. dieffenbachiae leads to a taxonomic revision of the X. axonopodis species complex. Plant Pathol 2016; 65:792-806.
  • 😷 The risk group for Belgium has been imported on 2024-02-01. The full classification is: risk group = 1, note = "pv. amorphophalli: 1 plant pathogen - biological class of risk plant: 2; pv. argemones: 1 plant pathogen - biological class of risk plant: 2; pv. alangii: 1 plant pathogen - biological class of risk plant: 2; pv. alfalfae: 1 plant pathogen - biological class of risk plant: 2; pv. citrumelonis: 1 plant pathogen - biological class of risk plant: 2; pv. coracanae: 1 plant pathogen - biological class of risk plant: 2; pv. erythrinae: 1 plant pathogen - biological class of risk plant: 2; pv. physalidicola: 1 plant pathogen - biological class of risk plant: 2; pv. physalidis: 1 plant pathogen - biological class of risk plant: 2; pv. sesami: 1 plant pathogen - biological class of risk plant: 2; pv. tribuli: 1 plant pathogen - biological class of risk plant: 2". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1, note = "p". — 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 136 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 risk group of other species in the genus.
  • 🧍 Plant pathogenic according to Bull et al. (2007). Publication: Bull CT, De Boer SH, Denny TP, Firrao G, Fischer Le Saux M, Saddler GS, Scortichini M, Stead DE, Takikawa Y. Comprehensive list of names of plant pathogenic bacteria, 1980-2007. Journal of Plant Pathology 2010; 92:551-592.
  • 🧍 In the effective publication Xanthomonas euvesicatoria is proposed as a sp. nov., sp. rev. — 🧍 The etymology has been provided on request for validation. Publication: Euzeby JP. Validation list no. 110. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2006; 56:1459-1460.

Parent taxon: Xanthomonas Dowson 1939 (Approved Lists 1980)

Assigned by: Jones JB, Lacy GH, Bouzar H, Stall RE, Schaad NW. Reclassification of the xanthomonads associated with bacterial spot disease of tomato and pepper. Syst Appl Microbiol 2004; 27:755-762.

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Record number: 785202