Valid and accepted novel bacterial taxa derived from human clinical specimens and taxonomic revisions published in 2022.

Although some nomenclature changes have caused consternation among clinical microbiologists, the discovery of novel taxa and improving classification of existing groups of organisms is exciting and adds to our understanding of microbial pathogenesis. In this mini-review, we present an in-depth summary of novel taxonomic designations and revisions to prokaryotic taxonomy that were published in 2022. Henceforth, these bacteriology taxonomic summaries will appear annually. Several of the novel Gram-positive organisms have been associated with disease, namely, the -like organisms sp. nov. and sp. nov. A newly described species, sp. nov., is noteworthy for exhibiting multi-drug resistance. Among the novel Gram-negative pathogens, sp. nov. stands out as an organism associated with diarrhea and sepsis and has probably been co-circulating with pandemic for decades. Many new anaerobic organisms have been described in this past year largely from genetic assessments of gastrointestinal microbiome collections. With respect to revised taxa, as discussed in previous reviews, the genus continues to undergo further division into additional genera and reassignment of existing species into them. Reassignment of two subspecies of to species designations ( sp. nov. and sp. nov.) is also noteworthy. As was typical of previous reviews, literature updates for selected clinically relevant organisms discovered between 2017 and 2021 have been included.