Species Eperythrozoon wenyonii

Name: Eperythrozoon wenyonii corrig. Adler and Ellenbogen 1934 (Approved Lists 1980)

Category, proposed as: species, sp. nov.

Etymology: we.ny.o’ni.i. N.L. gen. masc. n. wenyonii, of Wenyon, named after C.M. Wenyon, an investigator of these organisms

Pronunciation (Latin), gender: ep-e-ry-t^hro-ZO-on we-ny-O-ni-i, neuter

Type strain: no culture isolated; parasite of Bos taurus

16S rRNA gene: AF016546 Analyse FASTA

Effective publication: Adler S, Ellenbogen V. A note on two new blood parasites of cattle, Eperythrozoon and Bartonella. Journal of Comparative Pathology 1934; 47:220-221.

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 (and explicitly recommended for medical use)

Risk group: 2

• Synonyms:

  • Name	Kind
    "Mycoplasma wenyonii" (Adler and Ellenbogen 1934) Neimark et al. 2002	homotypic synonym, not validly published
    "Candidatus Mycoplasma wenyonii" Neimark et al. 2001	homotypic synonym, pro-validly published under the ICNP
    "Mycoplasma wenyonii" (Adler and Ellenbogen 1934) Neimark and Kocan 1997	homotypic synonym, not validly published
    Eperythrozoon wenyoni Adler and Ellenbogen 1934 (Approved Lists 1980)	other spelling of name, inaccurate spelling

• Notes:
  • 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 1, note = "animal pathogen - biological class of risk animal: 2". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 2, note = "PV". — The risk group for Germany has been imported on 2026-08-13. The full classification is: risk group = 2, note = "t". — 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 8 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.
  • 🧍 The proposal of Neimark et al. (IJSEM 51:897) to reclassify Eperythrozoon wenyoniias "Candidatus Mycoplasma wenyonii" is not acceptable; E. wenyonii (AL) would loose standing in nomenclature. Publication: Neimark H, Johansson KE, Rikihisa Y, Tully JG. Proposal to transfer some members of the genera Haemobartonella and Eperythrozoon to the genus Mycoplasma with descriptions of 'Candidatus Mycoplasma haemofelis', 'Candidatus Mycoplasma haemomuris', 'Candidatus Mycoplasma haemosuis' and 'Candidatus Mycoplasma wenyonii'. Int J Syst Evol Microbiol 2001; 51:891-899. 🇺🇸
  • 🧍 In 2001, Neimark et al. proposed the transfer of Eperythrozoon wenyonii to the genus Mycoplasma with the Candidatus status, "Candidatus Mycoplasma wenyonii" Neimark et al. 2001. The Candidatus designation is for new, incompletely described taxa, in order to give them a provisional status; changing validly published names to Candidatus would lose their standing in nomenclature. So, Neimark et al. revise "Candidatus Mycoplasma wenyonii" to Mycoplasma wenyonii comb. nov. Publication: Murray RG, Stackebrandt E. Taxonomic note: implementation of the provisional status Candidatus for incompletely described procaryotes. Int J Syst Bacteriol 1995; 45:186-187. 🇩🇪
  • 🧍 Strains of Eperythrozoon wenyonii are cell-wall-less uncultivated parasitic bacteria that attach to the surface of host erythrocytes. 16S rRNA gene sequence has been determined for this species and phylogenetic analysis shows that this haemotrophic bacteria is closely related to species in the genus Mycoplasma Nowak 1929 (Approved Lists 1980) [1, 2]. To reflect this phylogenetic affiliation, Neimark et al. 2001 [2] propose that Eperythrozoon wenyonii be transferred to the genus Mycoplasma as "Candidatus Mycoplasma wenyonii". Publication: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 51, part 3 of the IJSEM. Int J Syst Evol Microbiol 2001; 51:1231-1233.

Parent taxon: Eperythrozoon Schilling 1928 (Approved Lists 1980)

Assigned by: Adler S, Ellenbogen V. A note on two new blood parasites of cattle, Eperythrozoon and Bartonella. Journal of Comparative Pathology 1934; 47:220-221.

Linking: To permanently link to this page, use https://doi.org/10.83108/rn.783789Copy to clipboardLink copied to clipboard

Record number: 783789

• Previous versions:

  • Version	Date	JSON
    1	2026-03-31