Blar i Bergen Open Research Archive på forfatter "Samuelsen, Ørjan"
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Gastrointestinal carriage of Klebsiella pneumoniae in a general adult population: a cross-sectional study of risk factors and bacterial genomic diversity
Raffelsberger, Niclas Peter; Hetland, Marit Andrea Klokkhammer; Svendsen, Kristian; Småbrekke, Lars; Löhr, Iren Høyland; Andreassen, Lotte; Brisse, Sylvain; Holt, Kathryn E.; Sundsfjord, Arnfinn; Samuelsen, Ørjan; Gravningen, Kirsten Midttun (Journal article; Peer reviewed, 2021)Antibiotic resistant Klebsiella pneumoniae is a leading public health threat and gastrointestinal carriage is an established risk factor for subsequent infections during hospitalization. Our study contributes new knowledge ... -
Horizontal plasmid transfer among klebsiella pneumoniae isolates is the key factor for dissemination of extended-spectrum β-lactamases among children in Tanzania
Pedersen, Torunn Annie; Tellevik, Marit Gjerde; Kommedal, Øyvind; Lindemann, Paul Christoffer; Moyo, Sabrina John; James Peter, Jessin Janice; Blomberg, Bjørn; Samuelsen, Ørjan; Langeland, Nina (Journal article; Peer reviewed, 2020)Increased knowledge about the role of horizontal gene transfer is key to improve our understanding of the spread of antimicrobial resistance (AMR) in human populations. We therefore studied the dissemination of the blaCTX-M-15 ... -
A nationwide genomic study of clinical Klebsiella pneumoniae in Norway 2001–15: introduction and spread of ESBLs facilitated by clonal groups CG15 and CG307
Fostervold, Aasmund; Hetland, Marit Andrea Klokkhammer; Bakksjø, Ragna-Johanne; Bernhoff, Eva; Holt, Kathryn E.; Samuelsen, Ørjan; Simonsen, Gunnar Skov; Sundsfjord, Arnfinn; Wyres, Kelly L.; Löhr, Iren Høyland (Journal article; Peer reviewed, 2022)Objectives To use the nationwide Norwegian surveillance programme on resistant microbes in humans (NORM) to address longitudinal changes in the population structure of Klebsiella pneumoniae isolates from 2001–15, focusing ... -
Risk of death in Klebsiella pneumoniae bloodstream infections is associated with specific phylogenetic lineages
Fostervold, Aasmund; Raffelsberger, Niclas Peter; Hetland, Marit; Bakksjø, Ragna-Johanne; Bernhoff, Eva; Samuelsen, Ørjan; Sundsfjord, Arnfinn Ståle; Afset, Jan Egil; Berntsen, Christopher Friis; Bævre-Jensen, Roar Magne; Ebbesen, Marit Helen; Gammelsrud, Karianne Wiger; Guleng, Anja D.; Handal, Nina; Jakovljev, Aleksandra; Johal, Simreen Kaur; Marvik, Åshild; Natvik, Ane Kristine; Sandnes, Rolf-Arne; Tofteland, Ståle; Bjørnholt, Jørgen; Löhr, Iren Høyland (Journal article; Peer reviewed, 2024)Background Klebsiella pneumoniae species complex (KpSC) bloodstream infections (BSIs) are associated with considerable morbidity and mortality, particularly in elderly and multimorbid patients. Multidrug-resistant (MDR) ...