ArticleIJID regions2026
Genomic characterization of carbapenem-resistant Gram-negative bacilli isolated from hospital wastewater in Niamey, Niger.
Article in IJID regions, 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
Objectives: This study aims to characterize the resistance gene profiles in cultured isolates and clonal diversity of bacterial isolates from wastewater collected at three major hospitals in Niamey. Methods: Samples of raw and treated wastewater were collected at the Niamey National Hospital, the Amirou Boubacar Diallo National Hospital, and the General Referral Hospital. An approach combining classical microbiology and whole-genome sequencing was used to identify bacterial species and characterize their carbapenem resistance mechanisms. Results: Analysis revealed a strong predominance of Conclusion: This preliminary study provides crucial baseline data on carbapenem resistance in hospital wastewater in Niamey. This study provides the first baseline genomic data on carbapenemases dynamics in hospital wastewater in Niamey. The persistence of international elite clones (ST11, ST773) and epidemic plasmids (IncFII, IncL, IncX3) throughout the treatment process underscores the ineffectiveness of current sanitation barriers. These findings necessitate the following actions: (i) the adoption of environmental genomic surveillance as an early warning system for emerging clinical clones, (ii) the revision of disinfection protocols to target the stability of mobile genetic elements, and (iii) the urgent integration of this approach into national action plans for combating antimicrobial resistance in Niger and West Africa to prevent irreversible environmental dissemination.
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