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John Elmerdahl Olsen

Københavns Universitet

Denmark

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Research Interests

Microbiology

80%

Virology

20%

Host-pathogen Interaction

30%

Antibiotic Resistance

30%

Intestinal Biology

30%

Gut Microbiota

20%

Pathogen Biology

20%

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Articles20

Mutation Rates and Fitness Genes in <i>Staphylococcus aureus</i> Treated with the Medicinal Plant <i>Synadenium glaucescens</i>

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Year:

2025

The Secondary Resistome of Methicillin-Resistant Staphylococcus aureus to β-Lactam Antibiotics

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2025

Comparison of genomic assembly and annotation based on two clones of avian pathogenic Escherichia coli

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2025

Outer Membrane Proteins as Vaccine Targets Against Lawsonia intracellularis in Piglets

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2025

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

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2025

Screening Actinomycetes extracts for antimicrobial compounds against methicillin-resistant Staphylococcus aureus and helper-compounds against aminoglycoside-resistant E. coli

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2025

Prevalence and infection characteristics of common pathogens associated with calf diarrhoea in Danish dairy calves

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2025

Mechanistic divergence between SOS response activation and antibiotic-induced plasmid conjugation in Escherichia coli

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2025

Comparing diarrhoeic grades and pathogens present in faecal samples obtained from Danish calves infected with one or more pathogens

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Year:

2025

Screening Actinomycetes extracts for antimicrobial compounds against methicillin-resistant Staphylococcus aureus and helper-compounds against aminoglycoside-resistant E. coli

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Year:

2025

The global transcriptomes of Salmonella enterica serovars Gallinarum, Dublin and Enteritidis in the avian host

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Year:

2023

Prevalence and whole genome phylogenetic analysis reveal genetic relatedness between antibiotic resistance Salmonella in hatchlings and older chickens from farms in Nigeria

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Year:

2023

Gastro-intestinal lesions are not relatable to diarrhoea or specific pathogens in post-weaning diarrhoea (PWD) in pigs

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2023

An observational field study of porcine post-weaning diarrhea

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2023

Incidence and Genomic Background of Antibiotic Resistance in Food-Borne and Clinical Isolates of Salmonella enterica Serovar Derby from Spain

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2023

Identification of Salmonella Pullorum Factors Affecting Immune Reaction in Macrophages from the Avian Host

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2023

Uncovering the Important Genetic Factors for Growth during Cefotaxime-Gentamicin Combination Treatment in blaCTX-M-1 Encoding Escherichia coli

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2023

Assessing phenotypic virulence of Salmonella enterica across serovars and sources

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2023

Bacteriostatic and Haemolytic Activities of Extracts and Compounds of Commiphora swynnertonii

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Year:

2023

Genomics, biofilm formation and infection of bladder epithelial cells in potentially uropathogenic Escherichia coli (UPEC) from animal sources and human urinary tract infections (UTIs) further support food-borne transmission

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Year:

2023

Collaborators20

Søren Nielsen

Københavns Universitet

DENMARK

Henrik Elvang Jensen

Københavns Universitet

DENMARK

Lotte Jelsbak

Associate Professor at Roskilde University

Roskilde University

DENMARK

Kara-Lee Aves

University of Copenhagen

DENMARK

Nicole Bakkegård Goecke

Assistant Professor

University of Copenhagen

DENMARK

Maria del Rosario Rodicio-Rodicio

Professor

University of Oviedo

SPAIN

Morten Agertoug Nielsen

Københavns Universitet

DENMARK

Henrik Christensen

Københavns Universitet

DENMARK

Xenia Vázquez Sánchez

Instituto de Productos Lácteos de Asturias

SPAIN

Vanesa García

Assistant Professor

Universidade de Santiago de Compostela

SPAIN

Jens Peter Christensen

Københavns Universitet

DENMARK

Esben Østergaard Eriksen

Københavns Universitet

DENMARK

Martin Saxtorph Bojer

Københavns Universitet

DENMARK

Inge Larsen

Københavns Universitet

DENMARK

Abdurrahman Jibril

Københavns Universitet

DENMARK

Sandra Marina Wellner

Københavns Universitet

DENMARK

Adam Frederik Sander Bertelsen

Københavns Universitet

DENMARK

Line Elnif Thomsen

Associate Professor

University of Copenhagen

DENMARK

Sophie Amalie Blirup-Plum

Assistant Professor

University of Copenhagen

DENMARK

Lars Erik Larsen

Københavns Universitet

DENMARK

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