ArticleBMC microbiology2026
Beyond the boundaries of microbial diversity in radioactive environments: novel microbial species isolated from a former silver-uranium mine's radon-saturated waters.
Article in BMC microbiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The Svornost mine in Jáchymov (Joachimstahl), Czech Republic, historically the world's first radium mine and formerly a silver-uranium mine, is currently the deepest facility exploiting radon-saturated waters. These geologically ancient waters, approximately 13,000 years old, exhibit unique physicochemical properties and are generally considered inhospitable to life. Nevertheless, they harbor phylogenetically and evolutionarily distinct microorganisms. A previous culturomic survey yielded nine Gram-stain-negative, rod-shaped, aerobic bacterial isolates. In this study, a polyphasic taxonomic approach, including 16S rRNA gene phylogeny, core-genome analyses, and comparisons of genome indices such as average nucleotide identity (ANI), average amino acid identity (AAI), and percentage of conserved proteins (POCP), together with physiological and chemotaxonomic characterization, confirmed the taxonomic novelty at species level of these nine strains. The novel strains span five bacterial classes (α-, β-, and γ-Proteobacteria, Cytophagia, and Flavobacteriia) and eight genera, and are herein proposed as Hymenobacter abyssi J193
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