Name: Xylella fastidiosa Wells et al. 1987

Category: Species

Proposed as: sp. nov.

Etymology: fas.ti.di.o’sa. L. fem. adj. fastidiosa, fastidious, referring to the nutritional fastidiousness of the organism, particularly on primary isolation

Pronunciation (Latin), gender: xy-LEL-la fas-ti-di-O-sa, feminine

Type strain: ATCC 35879; DSM 10026; ICMP 15197; ICPB 50025; LMG 17159; PCE-RR

Conduct genome-based taxonomy at

16S rRNA gene: AF192343 Analyse FASTA

Valid publication: Wells JM, Raju BC, Hung HY, Weisburg WG, Mandelco-Paul L, Brenner DJ. Xylella fastidiosa gen. nov., sp. nov.: gram-negative, xylem-limited, fastidious plant bacteria related to Xanthomonas spp. Int. J. Syst. Bacteriol. 1987; 37:136-143. 🇺🇸

Nomenclatural status: validly published under the ICNP

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

Risk group: 3

• Synonyms:

  • Name	Kind
    "Xylella fastidiosa subsp. piercei" Schaad et al. 2004	homotypic synonym, not validly published, distinct rank

• Notes:
  • 🥇 Nomenclatural type of the genus Xylella Wells et al. 1987. Publication: Wells JM, Raju BC, Hung HY, Weisburg WG, Mandelco-Paul L, Brenner DJ. Xylella fastidiosa gen. nov., sp. nov.: gram-negative, xylem-limited, fastidious plant bacteria related to Xanthomonas spp. Int. J. Syst. Bacteriol. 1987; 37:136-143. 🇺🇸
  • 😷 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 = 3, note = "PP QUA". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1, note = "p2". — 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 1145 times in PubMed until 2026-06-11.
  • 🙆 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 the species itself.
  • 🧍 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. 🇺🇸
  • 🧍 Plant pathogenic according to Bull et al. (2012). Publication: Bull CT, De Boer SH, Denny TP, Firrao G, Fischer Le Saux M, Saddler GS, Scortichini M, Stead DE, Takikawa Y. List of new names of plant pathogenic bacteria (2008-2010). Journal of Plant Pathology 2012; 94:21-27. 🇺🇸

Subdivision:

Number of child taxa with a validly published and correct name: 2
Number of child taxa with a validly published name, including synonyms: 2
Total number of child taxa: 4

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Xylella fastidiosa subsp. fastidiosa (Wells et al. 1987) Schaad et al. 2009	validly published under the ICNP	correct name
    Xylella fastidiosa subsp. multiplex Schaad et al. 2009	validly published under the ICNP	correct name
    "Xylella fastidiosa subsp. pauca" Schaad et al. 2004	not validly published	preferred name
    "Xylella fastidiosa subsp. piercei" Schaad et al. 2004	not validly published	synonym

Parent taxon: Xylella Wells et al. 1987

Assigned by: Wells JM, Raju BC, Hung HY, Weisburg WG, Mandelco-Paul L, Brenner DJ. Xylella fastidiosa gen. nov., sp. nov.: gram-negative, xylem-limited, fastidious plant bacteria related to Xanthomonas spp. Int. J. Syst. Bacteriol. 1987; 37:136-143. 🇺🇸

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Record number: 783191