Browsing Bergen Open Research Archive by Author "Sivertsen, Audun"
Now showing items 1-6 of 6
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Comprehensive contact tracing during an outbreak of alpha-variant SARS-CoV-2 in a rural community reveals less viral genomic diversity and higher household secondary attack rates than expected
Sivertsen, Audun; Mortensen, Nicolay; Solem, Unni; Valen, Eivind; Bullita, Marie Francoise; Wensaas, Knut-Arne; Litleskare, Sverre; Rørtveit, Guri; Grewal, Harleen; Ulvestad, Elling (Journal article; Peer reviewed, 2024)Sequencing of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) genomes throughout the COVID-19 pandemic has generated a wealth of data on viral evolution across populations, but only a few studies have so far ... -
Cryptosporidium species and subtypes in Norway: predominance of C. parvum and emergence of C. mortiferum
Tipu, Jahid Hasan; Sivertsen, Audun; Afset, Jan Egil; Sandven, Lars; Brekke, Hanne; Lund, Hilde Marie; Elburg, Linnea Sofie; Gaustad, Peter; Lier, Tore; Tverelv, Liv Reidun; Johansen, Øystein Haarklau; Robertson, Lucy; Hanevik, Kurt (Journal article; Peer reviewed, 2024)PCR-based diagnostics has revealed the previously largely unknown Cryptosporidium transmission and infections in high-income countries. This study aimed to determine domestic and imported subtypes of Cryptosporidium species ... -
Escherichia marmotae—a Human Pathogen Easily Misidentified as Escherichia coli
Sivertsen, Audun; Dyrhovden, Ruben; Tellevik, Marit Gjerde; Bruvold, Torbjørn Sæle; Nybakken, Eirik Jovall; Skutlaberg, Dag Harald; Skarstein, Ingerid; Kommedal, Øyvind (Journal article; Peer reviewed, 2022)We hereby present the first descriptions of human-invasive infections caused by Escherichia marmotae, a recently described species that encompasses the former “Escherichia cryptic clade V.” We describe four cases, one acute ... -
Genomic epidemiology of Streptococcus dysgalactiae subsp. equisimilis strains causing invasive disease in Norway during 2018
Kaci, Alba; Jonassen, Christine M; Skrede, Steinar; Sivertsen, Audun; Steinbakk, Martin; Oppegaard, Oddvar (Journal article; Peer reviewed, 2023)Background: Streptococcus dysgalactiae subspecies equisimilis (SDSE) is an emerging global pathogen, yet the epidemiology and population genetics of SDSE species have not been extensively characterized. Methods: We ... -
Longitudinal investigation of a single variant SARS-CoV-2-outbreak in the immunologically naïve population of Ulvik, Norway
Mortensen, Nicolay; Wensaas, Knut-Arne; Solem, Unni; Sivertsen, Audun; Grewal, Harleen; Rørtveit, Guri; Ulvestad, Elling; Litleskare, Sverre (Journal article; Peer reviewed, 2024)Purpose To perform an extensive investigation of the clinical features and long-term complications among the n = 134 adults and children with nucleic acid amplification test (NAAT) verified SARS-CoV-2-infection in the ... -
Streptococcus dysgalactiae Bloodstream Infections, Norway, 1999-2021
Oppegaard, Oddvar; Glambek, Marte; Skutlaberg, Dag Harald; Skrede, Steinar; Sivertsen, Audun; Kittang, Bård Reiakvam (Journal article; Peer reviewed, 2023)Streptococcus dysgalactiae increasingly is recognized as a pathogen of concern for human health. However, longitudinal surveillance data describing temporal trends of S. dysgalactiae are scarce. We retrospectively identified ...