ArticleWorld journal of microbiology & biotechnology2026
Not so innocent: Environmental Klebsiella pneumoniae disseminating resistance and virulence via conjugation.
Article in World journal of microbiology & biotechnology, 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 acquisition of carbapenem resistance and hypervirulence traits in Klebsiella pneumoniae results in the emergence of certain high-risk clones posing significant public health threat. This convergence is largely driven by conjugative plasmids, however, there are limited studies on environmental reservoirs and transmission potential of such isolates. In this study, we investigated the phenotypic trait for hypervirulence in Carbapenem-resistant hypervirulent Klebsiella pneumoniae (CR-hvKp) isolated from a river system in Odisha, India, assessed their ability to co-transfer carbapenemase and virulence genes via conjugation, and evaluated their virulence using the Galleria mellonella model. The four environmental CR-hvKp (CR-hvKp4, CR-hvKp5, CR-hvKp9, CR-hvKp13) strains exhibited moderate biofilm formation. CR-hvKp9 displayed higher siderophore production with 73.98 PSU compared to the control clinical strain (65.63 PSU). Infection of G. mellonella larvae revealed high virulence for CR-hvKp9 and CR-hvKp13, causing ≥ 70-80% mortality by 96 h post infection. Conjugation assays confirmed the co-transfer of carbapenemase (bla
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