Publications by authors named "John Olsen"

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Exploring the susceptome of methicillin-resistant Staphylococcus aureus to oxacillin and cefazolin using integrated transposon-directed insertion site sequencing and proteomics.
Nader Abdelmalek, Sally W Yousief, Alessandro Tanca, Martin S Bojer, Mosaed Saleh A Alobaidallah, John E Olsen

Int J Antimicrob Agents· December 2025

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Identification of a novel gene associated with group B Streptococcus persister cell formation and biofilm production.
Nanna Boll Greve, Xiao Fei, Anders Per Håkansson, John Elmerdahl Olsen, Line Elnif Thomsen

Sci Rep· December 2025

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Origin and development of two clones vertically transferred in broiler production.
Yufei Zhao, Annet Heuvelink, John Elmerdahl Olsen, Louise Poulsen, Henrik Christensen

Microb Genom· November 2025

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Comparing diarrhoeic grades and pathogens present in faecal samples obtained from Danish calves infected with one or more pathogens.
John Elmerdahl Olsen, Birgitta Svensmark, Lene Agerskov, Kenneth Krogh, Rikke H Olsen

Vet Rec· October 2025

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Diversity of from Faecal Samples of Danish Calves with Diarrhoea.
Anna Luiza Farias Alencar, Abdurrahman Hassan Jibril, Birgitta Svensmark, Lene Agerskov, Henrik Læssøe Martin, John Elmerdahl Olsen, Rikke Heidemann Olsen

Vet Sci· October 2025

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Screening extracts for antimicrobial compounds against methicillin-resistant and helper-compounds against aminoglycoside-resistant .
Dina Al Nahhas, Sandra Marina Wellner, Margherita Sosio, Sonia I Maffioli, Salvatore Pisanu, John Elmerdahl Olsen

Open Res Eur· September 2025

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Comparison of genomic assembly and annotation based on two clones of avian pathogenic Escherichia coli.
Yufei Zhao, John Elmerdahl Olsen, Louise Poulsen, Henrik Christensen

Res Microbiol· September 2025

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Prevalence and infection characteristics of common pathogens associated with calf diarrhoea in Danish dairy calves.
John Elmerdahl Olsen, Birgitta Svensmark, Lene Agerskov, Maja Albrechtsen, Rikke Heidemann Olsen

Vet Microbiol· August 2025

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Histopathological characterisation of omphalitis in piglets.
Sophie Amalie Blirup-Plum, Henrik Elvang Jensen, Søren Saxmose Nielsen, Katrine Top Hartmann, Mette Sif Hansen, John Elmerdahl Olsen

Acta Vet Scand· August 2025

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Salmonella Heidelberg isolates from poultry in Brazil and the United States share a large number of resistance and virulence determinants.
Valdinete P Benevides, Mauro M S Saraiva, Isabella C Campos, Priscila R Guerra, Saura R Silva, John E Olsen

Microb Pathog· July 2025

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Mechanistic divergence between SOS response activation and antibiotic-induced plasmid conjugation in .
Ruoxuan Zhao, Arkadiusz Nawrocki, Jakob Møller-Jensen, Gang Liu, John Elmerdahl Olsen

Microbiol Spectr· July 2025

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Unveiling the Genomic Landscape of Understudied Salmonella enterica Serovars from Poultry and Human: Implications for Food Safety.
Valdinete P Benevides, Mauro M S Saraiva, Viviane A Ferreira, Michelli Inácio G Funnicelli, Lucas B Rodrigues Alves, John E Olsen

Curr Microbiol· May 2025

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Whole-genome characterization and global phylogenetic comparison of cefotaxime-resistant Escherichia coli isolated from broiler chickens.
Shahana Ahmed, Tridip Das, Chandan Nath, Tahia Ahmed, Keya Ghosh, John Elmerdahl Olsen

J Microbiol· April 2025

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Deletion of pcnB affects antibiotic susceptibility in resistant Escherichia coli by reducing copy number of ColE1-family plasmids.
Sandra Marina Wellner, Xiao Fei, Ana Herrero-Fresno, John Elmerdahl Olsen

Sci Rep· March 2025

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Selection of resistant coliform bacteria in the intestine of pigs following flock versus individual treatment with neomycin against post-weaning diarrhoae or amoxicillin against umbilical infection.
Egle Kudirkiene, Esben Østergaard Eriksen, Gang Liu, Anja Ejlersgård Christensen, Marianne Viuf Agerlin, John Elmerdahl Olsen

Lett Appl Microbiol· February 2025

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Can infectious omphalitis in piglets be clinically diagnosed during the first three days of life?
Sophie Amalie Blirup-Plum, Henrik Elvang Jensen, Katrine Top Hartmann, Søren Saxmose Nielsen, Karen Pankoke, John Elmerdahl Olsen

BMC Vet Res· February 2025

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Outer Membrane Proteins as Vaccine Targets Against in Piglets.
Kara L Aves, Ana H Fresno, Sajid Nisar, Mauro M Saraiva, Nicole B Goecke, John E Olsen

Vaccines (Basel)· February 2025

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A sequencing-based method for quantifying gene-deletion mutants of bacteria in the intracellular environment.
Xiao Fei, Zengzhi Yuan, Sandra Marina Wellner, Yibing Ma, John Elmerdahl Olsen

Front Microbiol· January 2025

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The Secondary Resistome of Methicillin-Resistant to β-Lactam Antibiotics.
Nader Abdelmalek, Sally Waheed Yousief, Martin Saxtorph Bojer, Mosaed Saleh A Alobaidallah, John Elmerdahl Olsen

Antibiotics (Basel)· January 2025

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Occurrence of Salmonella enterica in faecal sludge from Nigeria and genetic relatedness with strains associated with human infections in Africa.
Abdurrahman Hassan Jibril, Anders Dalsgaard, Iruka N Okeke, Aliyu Musawa Ibrahim, John Elmerdahl Olsen

J Appl Microbiol· December 2024

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Brief communication: Carrier rate, antimicrobial resistance and molecular typing of Staphylococcus aureus and Staphylococcus pseudintermedius in healthy dogs from Morogoro, Tanzania.
Abdul A S Katakweba, Christine M Iversen, John B Tsaxra, Amandus P Muhairwa, Arshnee Moodley, John E Olsen

Vet Dermatol· October 2024

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Deletions of ttrA and pduA genes in Salmonella enterica affect survival within chicken-derived HD-11 macrophages.
Mauro M S Saraiva, Valdinete P Benevides, Priscila R Guerra, Isabella C Campos, Lucas B Rodrigues Alves, John E Olsen

Curr Genet· August 2024

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Antimicrobial use and antimicrobial resistance in in semi-intensive and free-range poultry farms in Uganda.
Irene Mbatidde, Dickson Ndoboli, Dreck Ayebare, Dishon Muloi, Kristina Roesel, John Elmerdahl Olsen

One Health· June 2024

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Identification of antibiotic induced persister cells in Streptococcus agalactiae.
Nanna Boll Greve, Hans-Christian Slotved, John Elmerdahl Olsen, Line Elnif Thomsen

PLoS One· June 2024

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Genomic Features and Phylogenetic Analysis of Antimicrobial-Resistant Mbandaka ST413 Strains.
Valdinete P Benevides, Mauro M S Saraiva, Camila F Nascimento, Enrique J Delgado-Suárez, Celso J B Oliveira, John E Olsen

Microorganisms· February 2024

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