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Species Streptococcus toyakuensis
Name: Streptococcus toyakuensis Wajima et al. 2022
Etymology: to.ya.ku.en’sis. toyaku, Japanese abbreviation of Tokyo University of Pharmacy and Life Sciences; L. masc./fem. adj. suff. -ensis, place; N.L. masc. adj. toyakuensis
Pronunciation (Latin), gender: … to-ya-ku-EN-sis, masculine
Type strain: CCUG 75492; JCM 34623; TP1632
Conduct genome-based taxonomy at
16S rRNA gene:
LC650843
Analyse
FASTA
Effective publication:
Wajima T, Hagimoto A, Tanaka E, Kawamura Y, Nakaminami H. Identification and characterisation of a novel multidrug-resistant streptococcus, Streptococcus toyakuensis sp. nov., from a blood sample. J Glob Antimicrob Resist 2022; 29:316-322. 
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IJSEM list:
Oren A, Garrity GM. Validation list no. 207. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2022; 72:5517.
Nomenclatural status: validly published under the ICNP
Taxonomic status: synonym (and not recommended for medical use)
Correct name: Streptococcus mitis Andrewes and Horder 1906 (Approved Lists 1980)
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Synonyms:
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Name Kind Streptococcus gwangjuensis corrig. Park et al. 2024 heterotypic synonym, validly published under the ICNP Streptococcus humanilactis Guo et al. 2024 heterotypic synonym, validly published under the ICNP Streptococcus hohhotensis Li et al. 2024 heterotypic synonym, validly published under the ICNP Streptococcus gwangjuense Park et al. 2024 heterotypic synonym, inaccurate spelling Streptococcus chosunense Lim et al. 2024 heterotypic synonym, inaccurate spelling Streptococcus chosunensis corrig. Lim et al. 2024 heterotypic synonym, validly published under the ICNP Streptococcus mitis Andrewes and Horder 1906 (Approved Lists 1980) heterotypic synonym, validly published under the ICNP
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Notes:
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⏲ According to Kilian et al. (2025), this species is a later heterotypic synonym of Streptococcus mitis Andrewes and Horder 1906 (Approved Lists 1980).
Publication:
Kilian M, Slotved HC, Fuursted K, D'Mello A, Tettelin H. Re-evaluation of boundaries of Streptococcus mitis and Streptococcus oralis and demonstration of multiple later synonyms of Streptococcus mitis, Streptococcus oralis and Streptococcus thalassemiae: description of Streptococcus mitis subsp. carlssonii subsp. nov. and emended description of Streptococcus mitis. Int J Syst Evol Microbiol 2025; 75:6704. 🇩🇰
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🏢 Synonymy of this taxon was mentioned in an IJSEM list.
Publication:
Oren A, Göker M. Notification list. Notification that new names and new combinations have appeared in volume 75, part 3 of the IJSEM. Int J Syst Evol Microbiol 2025; 75:6765.
- ❗ Streptococcus toyakuensis 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 Streptococcus.
- 🎓 Name mentioned 4 times in PubMed until 2025-06-04.
- 🙅 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 pathogenicity of the species itself.
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🧍 See also Munson et al. (2023).
Publication:
Munson E, Carella A, Carroll KC. Valid and accepted novel bacterial taxa derived from human clinical specimens and taxonomic revisions published in 2022. J Clin Microbiol 2023; 61:e0083823.
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⏲ According to Kilian et al. (2025), this species is a later heterotypic synonym of Streptococcus mitis Andrewes and Horder 1906 (Approved Lists 1980).
Publication:
Kilian M, Slotved HC, Fuursted K, D'Mello A, Tettelin H. Re-evaluation of boundaries of Streptococcus mitis and Streptococcus oralis and demonstration of multiple later synonyms of Streptococcus mitis, Streptococcus oralis and Streptococcus thalassemiae: description of Streptococcus mitis subsp. carlssonii subsp. nov. and emended description of Streptococcus mitis. Int J Syst Evol Microbiol 2025; 75:6704.
Parent taxon: Streptococcus Rosenbach 1884 (Approved Lists 1980)
Assigned by:
Wajima T, Hagimoto A, Tanaka E, Kawamura Y, Nakaminami H. Identification and characterisation of a novel multidrug-resistant streptococcus, Streptococcus toyakuensis sp. nov., from a blood sample. J Glob Antimicrob Resist 2022; 29:316-322. 🇯🇵
Linking: To permanently link to this page, use https://lpsn.dsmz.de/species/streptococcus-toyakuensisLink copied to clipboard
Record number: 3776
This LPSN page was printed on 2026-03-13 01:49:32