Name: Eperythrozoon suis Splitter 1950 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: su’is. L. masc./fem. n. sus (gen. suis), a pig; L. gen. masc./fem. n. suis, of a pig

Pronunciation (Latin), gender: ep-e-ry-t^hro-ZO-on SU-is, neuter

Type strain: Illinois; no culture isolated

Conduct genome-based taxonomy at

16S rRNA gene: U88565 Analyse FASTA

Effective publication: Splitter EJ. Eperythrozoon suis n. sp. and Eperythrozoon parvum n. sp., 2 new blood parasites of swine. Science 1950; 111:513-514.

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: synonym (and not recommended for medical use)

Correct name: Mycoplasma suis corrig. (Splitter 1950) Neimark et al. 2002

Risk group: 2

• Synonyms:

  • Name	Kind
    "Candidatus Mycoplasma haemosuis" Neimark et al. 2001	homotypic synonym, pro-validly published under the ICNP
    Mycoplasma haemosuis (Splitter 1950) Neimark et al. 2002	homotypic synonym, inaccurate spelling
    Mycoplasma suis corrig. (Splitter 1950) Neimark et al. 2002	homotypic synonym, validly published under the ICNP

• Notes:
  • ❗ Eperythrozoon suis is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Eperythrozoon.
  • 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 2, note = "human and animal pathogen - biological class of risk animal: 2". — The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 2, note = "Animal classification RG: 2 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 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 2023-10-29. 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 56 times in PubMed until 2026-06-11.
  • 🙅 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as a synonym of 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 suisas "Candidatus Mycoplasma haemosuis" is not acceptable; E. suis (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 suis to the genus Mycoplasma with the Candidatus status: "Candidatus Mycoplasma haemosuis" 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 haemosuis" to Mycoplasma haemosuis nom. nov. — In violation of Rules 34a, 41a and 51b (2), the specific epithet suis is changed to haemosuis in the absence of the same epithet used for a different species in the genus Mycoplasma Nowak 1929. Consequently, Mycoplasma haemosuis (Splitter 1950) Neimark et al. 2002 is not in accordance with the rules of the ICNP and the correct name should be Mycoplasma suis (Splitter 1950) Neimark et al. 2002, 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 suis 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). To reflect this phylogenetic affiliation, Neimark et al. 2001 propose that Eperythrozoon suis be transferred to the genus Mycoplasma as "Candidatus Mycoplasma haemosuis". Neimark et al. 2001 form the new name haemosuis to avoid confusion with "Mycoplasma suis" (sic). However, the name "Mycoplasma suis" has no standing in nomenclature! 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: Splitter EJ. Eperythrozoon suis n. sp. and Eperythrozoon parvum n. sp., 2 new blood parasites of swine. Science 1950; 111:513-514.

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Record number: 783788