Update on novel, validly published, and included bacterial taxa derived from human clinical specimens and taxonomic revisions published in 2025
- 1Department of Medical Laboratory Science, Marquette University, Milwaukee, Wisconsin, USA
- 2Division of Medical Microbiology, Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- 3Wisconsin Clinical Laboratory Network, Laboratory Technical Advisory Group, Madison, Wisconsin, USA
Abstract
This review summarizes novel taxon designations ascribed to prokaryotes derived from human primary clinical material during calendar year 2025, as well as proposed revisions to existing taxonomy. Major activity took place in the Streptococcus genus, as more than one dozen novel species were validly and effectively published, with two of these later classified as synonyms of Streptococcus thalassemiae. Moreover, whole genome sequencing and phylogenetic investigation of Streptococcus mitis group organisms resulted in a proposal to designate five species-level Streptococcus spp. taxa as Streptococcus mitis and an additional taxon as Streptococcus oralis subsp. dentisani. More than one dozen taxa were newly included in order Enterobacterales in 2025. Select novel taxa within genera Providencia and Enterobacter commonly possessed genotypes that conferred resistance to carbapenem and/or higher-generation cephem agents. Stenotrophomonas muris sp. nov. and Terrisporobacter muris sp. nov., initially characterized in gnotobiotic murine systems within the past 4 years, had clinical significance in human infection that was demonstrated in primary literature. The vast majority of the more than 70 novel obligate anaerobic taxa were derived from microbiome studies and had little ascribed clinical significance. Four novel obligate anaerobic Gram-negative taxa were shown to be of greater abundance in persons with Parkinson’s disease than in those without. Updates to taxa previously published in the Journal of Clinical Microbiology compendia reveal that several could serve as reservoirs for multiple antimicrobial resistance determinants. One example is the non-glucose fermentative Gram-negative bacillus Pseudomonas juntendi.
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BibTeX
@article{carella2026update,
title = {{Update on novel, validly published, and included bacterial taxa derived from human clinical specimens and taxonomic revisions published in 2025}},
author = {Arianna Carella and Karen C. Carroll and Erik Munson},
journal = {Journal of Clinical Microbiology},
year = {2026},
month = sep,
doi = {10.1128/jcm.00973-26},
url = {https://doi.org/10.1128/jcm.00973-26},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Update on novel, validly published, and included bacterial taxa derived from human clinical specimens and taxonomic revisions published in 2025
AU - Arianna Carella
AU - Karen C. Carroll
AU - Erik Munson
PY - 2026
DA - 2026/09/04
JO - Journal of Clinical Microbiology
DO - 10.1128/jcm.00973-26
UR - https://doi.org/10.1128/jcm.00973-26
AB - This review summarizes novel taxon designations ascribed to prokaryotes derived from human primary clinical material during calendar year 2025, as well as proposed revisions to existing taxonomy. Major activity took place in the Streptococcus genus, as more than one dozen novel species were validly and effectively published, with two of these later classified as synonyms of Streptococcus thalassemiae. Moreover, whole genome sequencing and phylogenetic investigation of Streptococcus mitis group organisms resulted in a proposal to designate five species-level Streptococcus spp. taxa as Streptococcus mitis and an additional taxon as Streptococcus oralis subsp. dentisani. More than one dozen taxa were newly included in order Enterobacterales in 2025. Select novel taxa within genera Providencia and Enterobacter commonly possessed genotypes that conferred resistance to carbapenem and/or higher-generation cephem agents. Stenotrophomonas muris sp. nov. and Terrisporobacter muris sp. nov., initially characterized in gnotobiotic murine systems within the past 4 years, had clinical significance in human infection that was demonstrated in primary literature. The vast majority of the more than 70 novel obligate anaerobic taxa were derived from microbiome studies and had little ascribed clinical significance. Four novel obligate anaerobic Gram-negative taxa were shown to be of greater abundance in persons with Parkinson’s disease than in those without. Updates to taxa previously published in the Journal of Clinical Microbiology compendia reveal that several could serve as reservoirs for multiple antimicrobial resistance determinants. One example is the non-glucose fermentative Gram-negative bacillus Pseudomonas juntendi.
SN - 0095-1137
SN - 1098-660X
ER -