Johnsen PJ - Search Results

1

Modulation of multidrug-resistant clone success in Escherichia coli populations: a longitudinal, multi-country, genomic and antibiotic usage cohort study.

Pöntinen AK, Gladstone RA, Pesonen H, Pesonen M, Cléon F, Parcell BJ, Kallonen T, Simonsen GS, Croucher NJ, McNally A, Parkhill J, Johnsen PJ, Samuelsen Ø, Corander J. Pöntinen AK, et al. Among authors: johnsen pj. Lancet Microbe. 2024 Feb;5(2):e142-e150. doi: 10.1016/S2666-5247(23)00292-6. Epub 2024 Jan 11. Lancet Microbe. 2024. PMID: 38219757 Free article.

2

Stability, persistence, and evolution of plasmid-encoded VanA glycopeptide resistance in enterococci in the absence of antibiotic selection in vitro and in gnotobiotic mice.

Johnsen PJ, Simonsen GS, Olsvik O, Midtvedt T, Sundsfjord A. Johnsen PJ, et al. Microb Drug Resist. 2002 Fall;8(3):161-70. doi: 10.1089/107662902760326869. Microb Drug Resist. 2002. PMID: 12363004

3

Persistence of animal and human glycopeptide-resistant enterococci on two Norwegian poultry farms formerly exposed to avoparcin is associated with a widespread plasmid-mediated vanA element within a polyclonal enterococcus faecium population.

Johnsen PJ, Østerhus JI, Sletvold H, Sørum M, Kruse H, Nielsen K, Simonsen GS, Sundsfjord A. Johnsen PJ, et al. Appl Environ Microbiol. 2005 Jan;71(1):159-68. doi: 10.1128/AEM.71.1.159-168.2005. Appl Environ Microbiol. 2005. PMID: 15640183 Free PMC article.

4

Prevalence, persistence, and molecular characterization of glycopeptide-resistant enterococci in Norwegian poultry and poultry farmers 3 to 8 years after the ban on avoparcin.

Sørum M, Johnsen PJ, Aasnes B, Rosvoll T, Kruse H, Sundsfjord A, Simonsen GS. Sørum M, et al. Among authors: johnsen pj. Appl Environ Microbiol. 2006 Jan;72(1):516-21. doi: 10.1128/AEM.72.1.516-521.2006. Appl Environ Microbiol. 2006. PMID: 16391086 Free PMC article.

5

Comparative DNA analysis of two vanA plasmids from Enterococcus faecium strains isolated from poultry and a poultry farmer in Norway.

Sletvold H, Johnsen PJ, Simonsen GS, Aasnaes B, Sundsfjord A, Nielsen KM. Sletvold H, et al. Among authors: johnsen pj. Antimicrob Agents Chemother. 2007 Feb;51(2):736-9. doi: 10.1128/AAC.00557-06. Epub 2006 Nov 20. Antimicrob Agents Chemother. 2007. PMID: 17116680 Free PMC article.

6

Complete sequence of Enterococcus faecium pVEF3 and the detection of an omega-epsilon-zeta toxin-antitoxin module and an ABC transporter.

Sletvold H, Johnsen PJ, Hamre I, Simonsen GS, Sundsfjord A, Nielsen KM. Sletvold H, et al. Among authors: johnsen pj. Plasmid. 2008 Jul;60(1):75-85. doi: 10.1016/j.plasmid.2008.04.002. Epub 2008 Jun 3. Plasmid. 2008. PMID: 18511120

7

Factors affecting the reversal of antimicrobial-drug resistance.

Johnsen PJ, Townsend JP, Bøhn T, Simonsen GS, Sundsfjord A, Nielsen KM. Johnsen PJ, et al. Lancet Infect Dis. 2009 Jun;9(6):357-64. doi: 10.1016/S1473-3099(09)70105-7. Lancet Infect Dis. 2009. PMID: 19467475 Review.

8

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.

Rosvoll TC, Pedersen T, Sletvold H, Johnsen PJ, Sollid JE, Simonsen GS, Jensen LB, Nielsen KM, Sundsfjord A. Rosvoll TC, et al. Among authors: johnsen pj. FEMS Immunol Med Microbiol. 2010 Mar;58(2):254-68. doi: 10.1111/j.1574-695X.2009.00633.x. Epub 2009 Nov 17. FEMS Immunol Med Microbiol. 2010. PMID: 20015231 Free article.

9

Tn1546 is part of a larger plasmid-encoded genetic unit horizontally disseminated among clonal Enterococcus faecium lineages.

Sletvold H, Johnsen PJ, Wikmark OG, Simonsen GS, Sundsfjord A, Nielsen KM. Sletvold H, et al. Among authors: johnsen pj. J Antimicrob Chemother. 2010 Sep;65(9):1894-906. doi: 10.1093/jac/dkq219. Epub 2010 Jun 17. J Antimicrob Chemother. 2010. PMID: 20558469 Free PMC article.

10

Retrospective evidence for a biological cost of vancomycin resistance determinants in the absence of glycopeptide selective pressures.

Johnsen PJ, Townsend JP, Bøhn T, Simonsen GS, Sundsfjord A, Nielsen KM. Johnsen PJ, et al. J Antimicrob Chemother. 2011 Mar;66(3):608-10. doi: 10.1093/jac/dkq512. Epub 2011 Jan 7. J Antimicrob Chemother. 2011. PMID: 21217128 Free PMC article.

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