Ørjan Samuelsen

This study traces the evolutionary path from ST131-B to ST131-C clades in E. coli by analyzing genomic data from ST131-B0 isolates, revealing genetic changes associated with antibiotic resistance and host adaptation.

This study characterizes the diversity and niche associations of plasmids in Klebsiella pneumoniae species complex isolates from human, animal, and marine sources, revealing distinct patterns of antimicrobial resistance and virulence gene distribution.

This paper uses machine learning to predict the prevalence of ST131-C in UTIs and BSIs using antimicrobial susceptibility data, finding a link between UTI prevalence and BSI burden.

This study analyzes KpSC populations across human, animal, and marine sources in Norway, showing distinct yet overlapping populations with limited recent transmission between niches.

The paper uses long-read sequencing to analyze plasmids and chromosomes in E. coli over two decades, revealing long-term plasmid-lineage associations and success strategies.

This paper reclassifies SHV β-lactamase alleles in K. pneumoniae genomes based on mutations, improving genotype-phenotype understanding and updating the Kleborate tool.

The paper introduces a computational pipeline for consistent plasmid typing using long-read sequencing data, enabling classification of novel and known plasmid types.

This study shows that β-lactamases from different Ambler classes confer cefiderocol resistance and can evolve to increase resistance through mutations.

The paper introduces a pipeline for genomic epidemiology using mixed samples, showing comparable results to colony picks in a nosocomial setting.