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2012:
Starikova Irina, Harms Klaus, Haugen Pål, Lunde Tracy T M, Primicerio Raul, Samuelsen Orjan, Nielsen Kaare M, Johnsen Pål J. A Trade-off between the Fitness Cost of Functional Integrases and Long-term Stability of Integrons.
PLoS Pathog 2012 Nov;8(11):e1003043. Epub 2012 nov 29. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3510236/
Rettedal S, Löhr IH, Natås O, Giske CG, Sundsfjord A, Øymar K. First outbreak of extended-spectrum β-lactamase producing Klebsiella pneumoniae in a Norwegian neonatal intensive care unit; associated with contaminated breast milk and resolved by strict cohorting. APMIS. 2012:120:612-621. http://www.ncbi.nlm.nih.gov/pubmed/22779683
Rettedal S, Löhr IH, Natås O, Giske CG, Sundsfjord A, Øymar K. Risk factors for acquisition of CTX-M-15 extended-spectrum beta-lactamase-producing Klebsiella pneumoniae during an outbreak in a neonatal intensive care unit in Norway. Scand. J. Infect. Dis. 2012 Epub. http://www.ncbi.nlm.nih.gov/pubmed/22991960
Tofteland S, Dahl K, Aasnæs B, Sundsfjord A, Naseer U. A nationwide study of mechanisms conferring reduced susceptibility to extended-spectrum cephalosporins in clinical Escherichia coli and Klebsiella spp. isolates. Scand. J. Infect. Dis. 2012. Epub. http://www.ncbi.nlm.nih.gov/pubmed/22991975
Naseer U, Olson-Liljequist BE, Woodford N, Dhanji H, Cantón R, Sundsfjord A, Lindstedt BA. Multi-locus variable number of tandem repeat analysis for rapid and accurate typing of virulent multidrug resistant Escherichia coli clones. PLoS One. 2012;7:e41232. http://www.ncbi.nlm.nih.gov/pubmed/22859970
Rosvoll TC, Lindstad BL, Lunde TM, Hegstad K, Aasnæs B, Hammerum A, Lester CH, Simonsen GS, Sundsfjord A, Pedersen T. Increased high-level gentamicin resistance in invasive Enterococcus faecium is associated with aac(6’)Ie-aph(2’’)Ia-encoding transferable megaplasmids hosted by major hospital-adapted lineages. FEMS Immunol. Microbiol. 2012; Epub. http://www.ncbi.nlm.nih.gov/pubmed/22672387
Dahle UR, Wester AL, Samuelsen Ø, Sundsfjord A. Siste skanse for effektive antibiotika? Tidskr. Nor. Legeforen. 2012;132:1725-1726. http://www.ncbi.nlm.nih.gov/pubmed/22929934
Karah N, Sundsfjord A, Towner K, Samuelsen Ø. Insights into the global molecular epidemiology of carbapenem non-susceptible clones of Acinetobacter baumannii. Karah N. et al. Drug Resist. Updates. 2012:15:237-247. http://www.ncbi.nlm.nih.gov/pubmed/22841809
Leiros H-KS, Borra PS, Brandsdal BO, Edwardsen KSW, Spencer J, Walsh T, Samuelsen Ø. Crystal structure of the mobile metallo-β-lactamase AIM-1 from Pseudomonas aeruginosa: insights into antibiotic binding and the role of Gln157. Antimicrob. Agents Chemother. 2012;56:4341-4353. http://www.ncbi.nlm.nih.gov/pubmed/22664968
Hansen F, Hammerum AM, Skov RL, Giske CG, Sundsfjord A, Samuelsen Ø. Evaluation of Rosco Neo-Sensitabs for phenotypic detection and subgrouping of ESBL-, AmpC- and carbapenemase-producing Enterobacteriaceae. APMIS. 2012;120:724-732. http://www.ncbi.nlm.nih.gov/pubmed/22882262
Nordmann P, Gniadkowski M, Giske CG, Poirel L, Woodford N, Miriagou V, European Network on Carbapenmases (Akova M, Miriagou V, Naas T, Nordmann P, Poirel L, Seifert H, Livermore D, Woodford N, Bogaerts P, Glupczynski Y, Canton R, Rossolini G, Giske C, Adler A, Carmeli Y, Navon-Venezia S, Samuelsen Ø, Cornaglia G, Gniadkowski M). Identification and screening of carbapenemase-producing Enterobacteriaceae. Clin. Microbiol. Infect. 2012;18:432-438. http://www.ncbi.nlm.nih.gov/pubmed/22507110
Cantón R, Akóva M, Carmeli Y, Giske CG, Glupczynski Y, Gniadkowski M, Livermore DM, Miriagou V, Naas T, Rossolini GM, Samuelsen Ø, Seifert H, Woodford N, Nordmann P; the European Network on Carbapenemases. Rapid evolution and spread of carbapenemases among Enterobacteriaceae in Europe. Clin. Microbiol. Infect. 2012;18:413-431. http://www.ncbi.nlm.nih.gov/pubmed/22507109
Naseer U, Eriksen BO, Sundsfjord A, Samuelsen Ø. Fecal colonization of VIM-1-producing Klebsiella pneumoniae and in vivo transfer of a multidrug-resistant IncN plasmid in a renal transplant patient. Diagn Microbiol Infect Dis. 2012;72:363-366. http://www.ncbi.nlm.nih.gov/pubmed/22300955
Salabi AE, Borra PS, Toleman MA, Samuelsen Ø, Walsh TR. Genetic and biochemical characterisation of a novel metallo-β-lactamase, TMB-1, from a Achromobacter xylosoxidans strain isolated from Tripoli, Libya. Antimicrob Agents Chemother. 2012;56:2241-2245. http://www.ncbi.nlm.nih.gov/pubmed/22290947
Haldorsen B, Samuelsen Ø. Multiresistente Gram-negative bakterier – et økende globalt helseproblem. Bioingeniøren. 2012;2:16-21.
Kuch A, Willems RJL, Werner G, Coque TM, Hammerum AM, Sundsfjord A, Klare I, Ruiz-Garbajosa, Simonsen GS, van Luit-Asbroek M, Hryniewicz W, Sadowy E. Insight into antimicrobial susceptibility and population structure of contemporary human Enterococcus faecalis isolates from Europe. J Antimicrob Chemother. 2012;67:551-558. http://www.ncbi.nlm.nih.gov/pubmed/22207599
Bengtsson S, Naseer U, Sundsfjord A, Kahlmeter G, Sundqvist M. Sequence types and plasmid carriage of uropathogenic Escherichia coli devoid of phenotypically detectable resistance. J. Antimicrob. Chemother. 2012;67:69-73. http://www.ncbi.nlm.nih.gov/pubmed/21980069
2011:
Giske C G, Gezelius L, Samuelsen Ø, Warner M, Sundsfjord A, Woodford N.
A sensitive and specific phenotypic assay for detection of metallo-ß-lactamases and KPC in Klebsiella pneumoniae with the use of meropenem disks supplemented with aminophenylboronic acid, dipicolinic acid and cloxacillin. Clin Microbiol Infect 2011 Apr;17(4):552-6.
Vading M, Samuelsen Ø, Haldorsen B, Sundsfjord A S, Giske C G.
Comparison of disk diffusion, Etest and VITEK2 for detection of carbapenemase-producing Klebsiella pneumoniae with the EUCAST and CLSI breakpoint systems. Clin Microbiol Infect 2011 May;17(5):668-74.
Werner Guido, Freitas Ana R, Coque Teresa M, Sollid Johanna E, Lester Camilla, Hammerum Anette M, Garcia-Migura Lourdes, Jensen Lars B, Francia Maria V, Witte Wolfgang, Willems R J, Sundsfjord Arnfinn.
Host range of enterococcal vanA plasmids among Gram-positive intestinal bacteria. J Antimicrob Chemother 2011 Feb;66(2):273-82.
Karah Nabil, Haldorsen Bjørg, Hermansen Nils O, Tveten Yngvar, Ragnhildstveit Eivind, Skutlaberg Dag H, Tofteland Ståle, Sundsfjord Arnfinn, Samuelsen Ørjan.
Emergence of OXA-carbapenemase- and 16S rRNA methylase-producing international clones of Acinetobacter baumannii in Norway. J Med Microbiol 2011 Apr;60(Pt 4):515-21.
Samuelsen Ørjan, Thilesen Carina M, Heggelund Lars, Vada Anne N, Kümmel Angela, Sundsfjord Arnfinn.
Identification of NDM-1-producing Enterobacteriaceae in Norway.
J Antimicrob Chemother 2011 Mar;66(3):670-2.
Seki Liliane M, Pereira Polyana S, de Souza Maria da Penha A H, Conceição Magda de S, Marques Elizabeth A, Porto Carlos Oliveira, Colnago Elvira Maria L, Alves Carlene de F M, Gomes Deize, Assef Ana Paula D A Carvalho, Samuelsen Ørjan, Asensi Marise D.
Molecular epidemiology of KPC-2- producing Klebsiella pneumoniae isolates in Brazil: the predominance of sequence type 437. Diagn Microbiol Infect Dis 2011 Jun;70(2):274-7.
Tveten Yngvar, Sarjomaa Marjut Anneli, Skaare Dagfinn, Grude Nils, Samuelsen Ørjan.
[How to stop multiresistant bacteria?]. Tidsskr Nor Laegeforen 2011 Apr;131(7):698-700.
Johnsen P J, Townsend J P, Bøhn T, Simonsen G S, Sundsfjord A, Nielsen K M.
Retrospective evidence for a biological cost of vancomycin resistance determinants in the absence of glycopeptide selective pressures. J Antimicrob Chemother 2011 Mar;66(3):608-10.
Naseer Umaer, Sundsfjord Arnfinn.
The CTX-M conundrum: dissemination of plasmids and Escherichia coli clones.
Microb Drug Resist 2011 Mar;17(1):83-97. Epub 2011 jan 31 PMID: 21281129
Karah Nabil, Haldorsen Bjørg, Hegstad Kristin, Simonsen Gunnar Skov, Sundsfjord Arnfinn, Samuelsen Ørjan.
Species identification and molecular characterization of Acinetobacter spp. blood culture isolates from Norway. J Antimicrob Chemother 2011 Apr;66(4):738-44.
Bjørkeng Eva, Rasmussen Gunlög, Sundsfjord Arnfinn, Sjöberg Lennart, Hegstad Kristin, Söderquist Bo. Clustering of polyclonal VanB-type vancomycin-resistant Enterococcus faecium in a low-endemic area was associated with CC17-genogroup strains harbouring transferable vanB2-Tn5382 and pRUM-like repA containing plasmids with axe-txe plasmid addiction systems. APMIS 2011 Apr;119(4-5):247-58.
Samuelsen Ø, Toleman M A, Hasseltvedt V, Fuursted K, Leegaard T M, Walsh T R, Sundsfjord A, Giske C G. Molecular characterization of VIM-producing Klebsiella pneumoniae from Scandinavia reveals genetic relatedness with international clonal complexes encoding transferable multidrug resistance. Clin Microbiol Infect 2011 Dec;17(12):1811-6.
Borra Pardha Saradhi, Leiros Hanna-Kirsti S, Ahmad Rafi, Spencer James, Leiros Ingar, Walsh Timothy R, Sundsfjord Arnfinn, Samuelsen Ørjan.
Structural and computational investigations of VIM-7: insights into the substrate specificity of VIM metallo-ß-lactamases. J Mol Biol 2011 Aug;411(1):174-89.
Sun J, Sundsfjord A, Song X.
Enterococcus faecalis from patients with chronic periodontitis: virulence and antimicrobial resistance traits and determinants. Eur J Clin Microbiol Infect Dis 2011 Jun. Epub 2011 jun 10
Karah Nabil, Giske Christian G, Sundsfjord Arnfinn, Samuelsen Ørjan.
A Diversity of OXA-Carbapenemases and Class 1 Integrons Among Carbapenem-Resistant Acinetobacter baumannii Clinical Isolates from Sweden Belonging to Different International Clonal Lineages. Microb Drug Resist 2011 Dec;17(4):545-9.
2010:
Hegstad Kristin, Langsrud Solveig, Lunestad Bjørn Tore, Scheie Anne Aamdal, Sunde Marianne, Yazdankhah Siamak P.
Does the wide use of quaternary ammonium compounds enhance the selection and spread of antimicrobial resistance and thus threaten our health? Microb Drug Resist 2010 Jun;16(2):91-104.
Lundblad Eirik Wasmuth, Altman Sidney.
Inhibition of gene expression by RNase P. N Biotechnol 2010 Jul;27(3):212-21.
Grundmann Hajo, Aanensen David M, van den Wijngaard Cees C, Spratt Brian G, Harmsen Dag, Friedrich Alexander W, European Staphylococcal Reference Laboratory Working Group.
Geographic distribution of Staphylococcus aureus causing invasive infections in Europe: a molecular-epidemiological analysis. PLoS Med 2010;7(1):e1000215.
Naseer U, Haldorsen B, Simonsen G S, Sundsfjord A.
Sporadic occurrence of CMY-2-producing multidrug-resistant Escherichia coli of ST-complexes 38 and 448, and ST131 in Norway. Clin Microbiol Infect 2010 Feb;16(2):171-8.
Bjørkeng Eva Katrin, Tessema Girum Tadesse, Lundblad Eirik Wasmuth, Butaye Patrick, Willems Rob, Sollid Johanna Ericsson, Sundsfjord Arnfinn, Hegstad Kristin.
ccrABEnt serine recombinase genes are widely distributed in the Enterococcus faecium and Enterococcus casseliflavus species groups and are expressed in E. faecium. Microbiology 2010 Dec;156(Pt 12):3624-34. Epub 2010 sep 3
Hegstad K, Mikalsen T, Coque T M, Werner G, Sundsfjord A
Mobile genetic elements and their contribution to the emergence of antimicrobial resistant Enterococcus faecalis and Enterococcus faecium. Clin Microbiol Infect 2010 Jun;16(6):541-54.
Sundsfjord A, Willems R
Enterococcus research: recent developments and clinical challenges. Clin Microbiol Infect 2010 Jun;16(6):525-6.
Sletvold H, Johnsen P J, Wikmark O-G, Simonsen G S, Sundsfjord A, Nielsen K M.
Tn1546 is part of a larger plasmid-encoded genetic unit horizontally disseminated among clonal Enterococcus faecium lineages. J Antimicrob Chemother 2010 Sep;65(9):1894-906. Epub 2010 jun 17
Vorobieva Veronika, Naseer Umaer, Bazhukova Tatiana, Semenova Nadezda, Haldorsen Bjorg C, Aasnaes Bettina, Simonsen Gunnar Skov, Sundsfjord Arnfinn.
Urinary tract isolates of Enterobacteriaceae from hospitalized patients in the Arkhangelsk region, Russia: antimicrobial susceptibility and characterization of extended-spectrum beta-lactamases strains. Scand J Infect Dis 2010 Oct;42(10):797-800.
Karah Nabil, Poirel Laurent, Bengtsson Stina, Sundqvist Martin, Kahlmeter Gunnar, Nordmann Patrice, Sundsfjord Arnfinn, Samuelsen Ørjan, and the Norwegian Study Group on PMQR.
Plasmid-mediated quinolone resistance determinants qnr and aac(6')-Ib-cr in Escherichia coli and Klebsiella spp. from Norway and Sweden. Diagn Microbiol Infect Dis 2010 Apr;66(4):425-31.
Rosvoll Torill C S, Pedersen Torunn, Sletvold Hege, Johnsen Pål J, Sollid Johanna E, Simonsen Gunnar S, Jensen Lars B, Nielsen Kaare M, Sundsfjord Arnfinn
PCR-based plasmid typing in Enterococcus faecium strains reveals widely distributed pRE25-, pRUM-, pIP501- and pHTbeta-related replicons associated with glycopeptide resistance and stabilizing toxin-antitoxin systems. FEMS Immunol Med Microbiol 2010 Mar;58(2):254-68. Epub 2009 nov 17
Samuelsen Orjan, Toleman Mark A, Sundsfjord Arnfinn, Rydberg Johan, Leegaard Truls M, Walder Mats, Lia Astrid, Ranheim Trond E, Rajendra Yashas, Hermansen Nils O, Walsh Timothy R, Giske Christian G.
Molecular epidemiology of metallo-beta-lactamase-producing Pseudomonas aeruginosa isolates from Norway and Sweden shows import of international clones and local clonal expansion. Antimicrob Agents Chemother 2010 Jan;54(1):346-52. Epub 2009 nov 2