César A. Arias

The paper reports an increase in USA300-SAE MRSA in Chile, links its spread to environmental copper resistance, and suggests copper exposure may enhance its fitness.

This study shows that NDM-7 carbapenemase is exported to outer membrane vesicles in Klebsiella pneumoniae, enabling extracellular antibiotic degradation and conferring resistance to imipenem and cefiderocol.

This study identifies FptA inactivation as a key step in cefiderocol resistance in Pseudomonas aeruginosa PA14, revealing resistance mechanisms and fitness costs.

The paper characterizes recalcitrant enterococcal bacteremia through clinical and genomic analysis, finding species-specific genetic adaptations in persistent infections.

This study shows that the MadR regulon can be activated independently of MadS through cross-talk with LiaS, enhancing Enterococcus faecalis resistance to daptomycin.

The paper assesses how ESBL-positive ST131 E. coli adapts to carbapenem exposure, finding increased ESBL gene copy numbers and Omp gene mutations correlate with resistance development.

This study examines TBDR mutations in P. aeruginosa clinical isolates and their association with cefiderocol resistance and heteroresistance.

This study identifies the MadRS system and its operon madEFG as mediators of resistance to antimicrobial peptides and antibiotics in Enterococcus faecalis, linking membrane lipid changes to stress response and virulence.

This study evaluates MDA's effectiveness for genome assembly with ONT sequencing, showing high-quality results from low DNA input and introducing a tool to mitigate concatemeric sequences.

This study identifies non-carbapenemase-producing CRE mechanisms in recurrent Enterobacterales infections driven by porin loss and β-lactamase gene amplification.