Arnfinn Sundsfjord
Marit,
Mia Angelique,
Håkon,
Fredrik,
Ragna-Johanne,
Eva
et al.:
A genome-wide One Health study of Klebsiella pneumoniae in Norway reveals overlapping populations but few recent transmission events across reservoirs
Genome Medicine 2025 DOI
Astri Lervik,
Torunn Annie,
Arnfinn,
Theodor Anton,
Anja Dyresen,
Jon Birger
et al.:
Hospital toilets and drainage systems as a reservoir for a long-term polyclonal outbreak of clinical infections with multidrug-resistant Klebsiella oxytoca species complex
Infection Prevention in Practice (IPIP) 2025 DOI
Bjørg,
Ørjan,
Jessin,
Miriam,
Mari,
Arnfinn
et al.:
Import of global high-risk clones is the primary driver of carbapenemase-producing Pseudomonas aeruginosa in Norway
Journal of Medical Microbiology 2025 DOI
Bhupender,
Mia Angelique,
Wasifa,
Johanna U,
Arnfinn
:
Lack of Spontaneous and Adaptive Resistance Development in Staphylococcus aureus Against the Antimicrobial Peptide LTX-109
Antibiotics 2025 DOI
Dagfinn,
Inger Lill,
Zecic,
Andrew John,
Dominique Andree Yette,
Trond Egil
et al.:
Genomic profiling of cefotaxime-resistant Haemophilus influenzae from Norway and Sweden reveals extensive expansion of virulent multidrug-resistant international clones
Frontiers in Microbiology 2025 DOI
Marit,
Mia Angelique,
Håkon,
Fredrik,
Ragna-Johanne,
Eva
et al.:
Complete genomes of 568 diverse Klebsiella pneumoniae species complex isolates from humans, animals, and marine sources in Norway from 2001 to 2020
Microbiology Resource Announcements (MRA) 2025 DOI
Hege,
Kristoffer,
Sandra Elena,
Arnfinn Ståle
:
FilmArray (BCID2) provides essential and timely results in bloodstream infections in small acute care hospitals without conventional microbiology services
Silvia,
Zlatina,
Chad M,
Ioana Diana,
Daniele,
Stefano
et al.:
WHO global research priorities for antimicrobial resistance in human health
Kara K.,
Margaret M C,
Ryan R.,
Kelly L.,
Michael,
Stephen
et al.:
Diversity, functional classification and genotyping of SHV β-lactamases in Klebsiella pneumoniae
Aasmund,
Niclas Peter,
Marit,
Ragna-Johanne,
Eva,
Ørjan
et al.:
Risk of death in Klebsiella pneumoniae bloodstream infections is associated with specific phylogenetic lineages
Theresa,
Jessin,
Marc,
Susan,
Anders da,
Geoffrey W
et al.:
Reversible vancomycin susceptibility within emerging ST1421 Enterococcus faecium strains is associated with rearranged vanA-gene clusters and increased vanA plasmid copy number
Marit,
Jane,
Eva,
Ragna-Johanne,
Håkon,
Siren
et al.:
Within-patient and global evolutionary dynamics of Klebsiella pneumoniae ST17
Kristin,
Anna Kaarina,
Jørgen,
Else Quist,
Arnfinn Ståle
:
The first tigecycline resistant Enterococcus faecium in Norway was related to tigecycline exposure
Mushtaq al,
Jessin,
Jørgen Vildershøj,
Oliver,
Bjørg C.,
Randi M.
et al.:
The population structure of vancomycin-resistant and
-susceptible Enterococcus faecium in a low-prevalence
antimicrobial resistance setting is highly influenced by
circulating global hospital-associated clones
Mushtaq Talib Shawi al,
Jessin,
Jørgen,
Iren Høyland,
Arnfinn Ståle,
Kristin
:
The first vanE-type vancomycin resistant Enterococcus faecalis isolates in Norway – phenotypic and molecular characteristics
Niclas Peter,
Dorota Julia,
Kristian,
Lars,
Anna Kaarina,
Iren Høyland
et al.:
Community carriage of ESBL-producing Escherichia coli and Klebsiella pneumoniae: a cross-sectional study of risk factors and comparative genomics of carriage and clinical isolates
Theresa,
Benjamin P,
Arnfinn,
Kristin
:
Transiently silent acquired antimicrobial resistance: an emerging challenge in susceptibility testing
Oskar,
Bjørg,
Anna Kaarina,
Jessin,
Ellen Haldis,
Petter
et al.:
Nationwide, population-based observational study of the molecular epidemiology and temporal trend of carbapenemase-producing Enterobacterales in Norway, 2015 to 2021
Tore Taksdal,
Christian G.,
Ulrik S,
Gunnar,
Erika,
Arnfinn
et al.:
Antimicrobial susceptibility testing of Bacteroides species by disk diffusion: The NordicAST Bacteroides study
Theresa Maria,
Anna Kaarina,
Mushtaq T.S. AL,
Arnfinn Ståle,
Kristin
:
Adaptive cell wall thickening in Enterococcus faecalis is associated with decreased vancomycin susceptibility
Clinical Microbiology and Infection (CMI) 2023 DOI
Paul Christoffer,
Torunn,
Dorthea Hagen,
Jessin,
Fredrik,
Ghantous Milad
et al.:
Intraregional hospital outbreak of OXA-244-producing Escherichia coli ST38 in Norway, 2020
Faheema E.,
Bjørg,
Isaac,
Osborne,
Tarsizio,
Fanuel
et al.:
Antimicrobial susceptibility profiles of clinically important bacterial pathogens at the Kamuzu Central Hospital in Lilongwe, Malawi
Kirsten Midttun,
Oliver,
Egil,
Torunn,
Bjørn Gunnar,
Anne Mette
et al.:
Pseudomonas aeruginosa countrywide outbreak in hospitals linked to pre-moistened non-sterile washcloths, Norway, October 2021 to April 2022
Faheema Ebrahim,
Bjørg,
Jessin,
Joshua,
Isaac,
Osborne
et al.:
Molecular Epidemiological Characterisation of ESBL- and Plasmid-Mediated AmpC-Producing Escherichia coli and Klebsiella pneumoniae at Kamuzu Central Hospital, Lilongwe, Malawi
Kenneth,
Dorota Julia,
Torunn Annie,
Erik,
Niclas Peter,
Yutaka
et al.:
Detection of Klebsiella pneumoniae human gut carriage: a comparison of culture, qPCR, and whole metagenomic sequencing methods
Caillan,
Victoriia,
Kathryn Jane,
Susanne,
Marje,
Hiraku
et al.:
Structural basis for PoxtA-mediated resistance to phenicol and oxazolidinone antibiotics
Abel F.N.D.,
Akebe Luther King,
Daniel Gyamfi,
Rajab,
Arnfinn,
Sabiha
et al.:
Burden, antibiotic resistance, and clonality of shigella spp. Implicated in community-acquired acute diarrhoea in Lilongwe, Malawi
Jessin,
Nicholas,
Alex,
Usha,
Sabiha,
Ørjan
et al.:
Carbapenem resistance determinants acquired through novel chromosomal integrations in extensively drug-resistant pseudomonas aeruginosa
Marit Østlyngen,
Sveinung Wergeland,
Gunnar Skov,
Arnfinn,
Josef,
Jan Martin
:
Risk of cervical intraepithelial neoplasia grade 3 or higher (CIN3+) among women with HPV-test in 1990–1992, a 30-year follow-up study
Mushtaq T.S.,
Jessin,
Jørgen Vildershøj,
Aleksandra,
Maria Elisabeth,
Arnfinn
et al.:
Novel genomic islands and a new vanD-subtype in the first sporadic VanD-type vancomycin resistant enterococci in Norway
Niclas Peter,
Marit Andrea Klokkhammer,
Kristian,
Lars,
Iren Høyland,
Lotte
et al.:
Gastrointestinal carriage of Klebsiella pneumoniae in a general adult population: a cross-sectional study of risk factors and bacterial genomic diversity
Calvina,
Tomas,
Sekyere,
Usha,
Hafizah Y.,
Gunnar Skov
et al.:
High prevalence of multidrug resistant ESBL- and plasmid mediated AmpC-producing clinical isolates of Escherichia coli at Maputo Central Hospital, Mozambique
Aasmund,
Marit Andrea Klokkhammer,
Ragna-Johanne,
Eva,
Kathryn E.,
Ørjan
et al.:
A nationwide genomic study of clinical Klebsiella pneumoniae in
Norway 2001–15: introduction and spread of ESBLs facilitated by
clonal groups CG15 and CG307
Theresa,
Jessin,
Audun,
Ingegerd,
Arnfinn,
Kristin
:
Alternative vanHAX promoters and increased vanA-plasmid copy number resurrect silenced glycopeptide resistance in Enterococcus faecium
Sara Lino,
Tomas,
John Osei,
Usha,
Hafizah Y.,
Gunnar Skov
et al.:
β-lactam and fluoroquinolone resistance in Enterobacteriaceae from imported and locally-produced chicken in Mozambique
Fredrik,
Marit Andrea Klokkhammer,
Cecilie Smith,
Arnfinn,
Bjørn Tore,
Nachiket
:
Antibiotic sensitivity screening of Klebsiella spp. and Raoultella spp. isolated from marine bivalve molluscs reveal presence of CTX-M-producing K. pneumoniae
Veronika,
Anne-Sofie,
Hans-Christian,
Tatiana,
Bjørg,
Dominique A
et al.:
Epidemiological and molecular characterization of Streptococcus pneumoniae carriage strains in pre-school children in Arkhangelsk, northern European Russia, prior to the introduction of conjugate pneumococcal vaccines
Alison,
Mark,
Thomas,
Lance B,
Arnfinn
:
End non-essential use of antimicrobials in livestock
The BMJ 2019 DOI
Ørjan,
Arnfinn,
Miriam,
Ragnhild,
Nina
:
Karbapenem-resistente Enterobacterales i Norge: Epidemiologi, spredning og tiltak
Folkehelseinstituttet 2025 ARKIV
Miriam,
Ørjan,
Niclas Peter,
Arnfinn Ståle,
Iren Høyland,
Aasmund
et al.:
Risikovurdering av hypervirulente Klebsiella pneumoniae i Norge : en norsk risikovurdering av ECDC sin Rapid Risk Assessment "Emergence of hypervirulent Klebsiella pneumoniae ST23 carrying carbapenemase genes in EU/EEA countries, first update"
Folkehelseinstituttet 2024 ARKIV
Maria Mellemstrand,
Janne,
Per Espen,
Paul Christoffer,
Aasmund,
Caroline Vestby
et al.:
Gentamicin bør fortsatt inngå i empirisk sepsisregime hos voksne
Morten,
Arnfinn Ståle
:
Improving antibiotic prescribing for uncomplicated UTIs
The BMJ 2023 DOI
Fredrik,
Arnfinn,
Cecilie Smith,
Bjørn Tore,
Nachiket
:
Klebsiella pneumoniae in the marine setting – a challenge for seafood safety?
2023
Marit,
Mia Angelique,
Thomas D,
Ryan R.,
Margaret MC,
Aasmund
et al.:
Klebsiella pneumoniae ecology and antimicrobial resistance in a One Health perspective
2023
Klara,
Arnfinn,
Pål Jarle,
Hanna-Kirsti S.,
Lise
:
CANS - Centre for New Antibacterial Strategies
2022
Marit,
Jane,
Eva,
Ragna-Johanne,
Håkon,
Siren
et al.:
Within-patient and global evolutionary dynamics of Klebsiella pneumoniae ST17
2022
Theresa,
Jessin Janice James,
Marc,
Susan A.,
Anders Goncalves da,
Geoffrey W
et al.:
Australian vancomycin variable E. faecium ST1421 revert to resistance by the use of an alternative vanHAX promoter and increased vanA-plasmid copy number
2021
Bjørg C,
Erika,
Jenny,
Gunnar,
Arnfinn,
Kristin
:
Performance of the EUCAST disc diffusion method and gradient tests in detection of linezolid susceptibility in Enterococcus faecalis and Enterococcus faecium
2021
Yngvild,
Henning,
Bjørn-Arne,
Adriana Dorota,
Arnfinn,
Hans Geir
et al.:
CORNELIA – Antimicrobial Resistance (AMR) in One Health Interfaces
2021
Paul Christoffer,
Karianne Wiger,
Iren Høyland,
Per Espen,
Morten,
Arnfinn
:
Valg av antibiotika - viktig endring i prøvesvar fra mikrobiologen
2019 DOI
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Research interests
- Antibiotika, antibiotikaresistente bakterier og evolusjon
- Klebsiella pneumoniae (Kp) er en sentral aktør i den globale spredningen av antibiotikaresistens. Våre studier involverer komparative molekylære epidemiologiske studier (helgenomsekvensering og metagenomikk) av Kp fra ulike økologiske nisjer inkludert mennesker og dyr, feno- og genotypiske assosiasjoner i patogenitet og antibiotikaresistens (genomassosiasjonsstudier og maskinlæring), samt prekliniske effekstudier av bakterievirus (bakteriofager) evne til å fjerne bærerskap eller infeksjoner med multiresistente Kp. Kp-studiene er finansiert av Trond Mohn Stiftelsen ( https://mohnfoundation.no/amr-prosjekter/) og partnerinstitusjoner.
- Leder for Senter for nye antibakterielle strategier (CANS; https://uit.no/research/cans): Et tverrfaglig forskningssenter finansiert av UiT og Tromsø Forskningsstiftelse (https://tfstiftelse.no/) 2019 -.
- Seksjonsoverlege, Nasjonal kompetansetjeneste for påvisning av antibiotikaresistens (K-res; https://unn.no/fag-og-forskning/k-res) ved Universitetssykehuset Nord-Norge (UNN) finansiert av Helse- og omsorgsdepartementet, Helse Nord RHF og UNN.
Member of research group
CV
Utdanning:
1983: Cand.med (MD) Universitetet i Tromsø
1991: Spesialist i Medisinsk mikrobiologi
1994: Dr.med (PhD) Universitetet i Tromsø
2000-01: Visiting Professor Institutt Pasteur, Paris
Yrkespraksis:
1983-95: Turnus-/militærlege. Assistent-/overlege Medisinsk mikrobiologi, Universitetssykehuset i Nord-Norge
1987-90: Stipendiat, Den Norske Kreftforening, v/UiT
1995-96: Avdelingsoverlege Mikrobiologisk avdeling, UNN
1995 - : Førsteamanuensis/Professor Medisinsk mikrobiologi, UiT
1996-00: Nestleder/Leder for studiestyret medisin, UiT
2005-09: Prodekan forskning, Det Medisinske fakultet, UiT
2009 - 17 : Dekan, Det helsevitenskapelige fakultet, UiT
Attachments:
- 20-01-16 CV_AS (pdf)