Theresa Wagner
Job description
Specialised in Microbiology, Immunology, Molecular Biology and Antimicrobial Resistance
Jérémy D.R. Cherbuin,
Jaime Llodrá,
Loïc Borcard,
Sabine Kaessmeyer,
Alban Ramette,
Javier Eduardo Fernandez
et al.:
Characterization of Phylogenetically Distinct Temperate Phages from Kenyan Mammaliicoccus sciuri
PHAGE: Therapy, Applications, and Research 09. October 2025 DOI
Theresa Wagner,
Sergi Torres-Puig,
Thatcha Yimthin,
Rossitza Irobalieva,
Manfred Heller,
Sabine Kaessmeyer
et al.:
Extracellular vesicles of minimalistic Mollicutes as mediators of immune modulation and horizontal gene transfer
Communications Biology 2025 DOI
Theresa Maria Wagner,
Anna Kaarina Pöntinen,
Carolin Fenzel,
Daniel Engi,
Jessin Janice,
Ana C. Almeida-Santos
et al.:
Interactions between commensal Enterococcus faecium and Enterococcus lactis and clinical isolates of Enterococcus faecium
Theresa Wagner,
Jessin Janice,
Marc Schluz,
Susan Ballard,
Anders da Silva,
Geoffrey W Coombs
et al.:
Reversible vancomycin susceptibility within emerging ST1421 Enterococcus faecium strains is associated with rearranged vanA-gene clusters and increased vanA plasmid copy number
Theresa Maria Wagner,
Felipe Romero-Saavedra,
Diana Laverde,
Mona Susan Johannessen,
Johannes Hübner,
Kristin Hegstad
:
Enterococcal Membrane Vesicles as Vaccine Candidates
Jessin Janice,
Theresa Maria Wagner,
Karina Olsen,
Joachim Hegstad,
Kristin Hegstad
:
Emergence of vancomycin-resistant enterococci from vancomycin-susceptible enterococci in hospitalized patients under antimicrobial therapy
Theresa Wagner,
Benjamin P Howden,
Arnfinn Sundsfjord,
Kristin Hegstad
:
Transiently silent acquired antimicrobial resistance: an emerging challenge in susceptibility testing
Theresa Maria Wagner,
Anna Kaarina Pöntinen,
Mushtaq T.S. AL Rubaye,
Arnfinn Ståle Sundsfjord,
Kristin Hegstad
:
Adaptive cell wall thickening in Enterococcus faecalis is associated with decreased vancomycin susceptibility
Clinical Microbiology and Infection (CMI) 2023 DOI
Theresa Wagner,
Jessin Janice,
Audun Sivertsen,
Ingegerd Sjögren,
Arnfinn Sundsfjord,
Kristin Hegstad
:
Alternative vanHAX promoters and increased vanA-plasmid copy number resurrect silenced glycopeptide resistance in Enterococcus faecium
Audun Sivertsen,
Jessin Janice James Peter,
Torunn Annie Pedersen,
Theresa Wagner,
Joachim Hegstad,
Kristin Hegstad
:
The enterococcus cassette chromosome, a genomic variation enabler in enterococci
Theresa Wagner,
Jessin Janice James Peter,
Fernanda Paganelli,
Rob J.L. Willems,
Fatemeh Askarian,
Torunn Annie Pedersen
et al.:
Enterococcus faecium TIR-Domain Genes Are Part of a Gene Cluster Which Promotes Bacterial Survival in Blood
Fatemeh Askarian,
Theresa Wagner,
Mona Johannessen,
Victor Nizet
:
Staphylococcus aureus modulation of innate immune responses
through Toll-like (TLR), (NOD)-like (NLR) and C-type lectin (CLR)
receptors
FEMS Microbiology Reviews 2018 DOI
Theresa Wagner,
Bishnu Joshi,
Jessin Janice James Peter,
Fatemeh Askarian,
Natasa Skalko-Basnet,
Ole Christian Hagestad
et al.:
Enterococcus faecium produces membrane vesicles containing virulence factors and antimicrobial resistance related proteins
Jonathan Hira,
Bhupender Singh,
Theresa Maria Wagner,
Kristin Hegstad,
Mona Susan Johannessen,
Christian Stephan Lentz
:
A high-throughput platform for phenotypic profiling of bacteria coupled to single cell-derived growth analysis
2023
Ingeborg Mathiesen,
Anna Kaarina Pöntinen,
Mona Johannessen,
Kristin Hegstad,
Theresa Wagner
:
Characterization of Putative Virulence Factors in Enterococcus faecium
2023
Ingeborg Mathiesen,
Theodor Anton Ross,
Anna Kaarina Pöntinen,
Einar Holsbø,
Michael Kampffmeyer,
Mona Johannessen
et al.:
Characterization of Putative Virulence Factors in Enterococcus faecium
2023
Theresa Wagner,
Anna Kaarina Pöntinen,
Carolin Kornelia Fenzel,
Daniel Engi,
Jessin Janice,
Ana Almeida-Santos
et al.:
Competition between commensal Enterococcus faecium and Enterococcus lactis and clinical isolates of E. faecium
2023
Theresa Wagner
:
Beyond detection: The perils of bacteria’s secret weapons
EurekAlert! 10. March 2023 FULLTEKST
Theresa Wagner,
Henriette Bertheussen Isachsen
:
Norsk studie: Skjult antibiotikaresistens gir terapisvikt
27. February 2023 FULLTEKST
Carolin Kornelia Fenzel,
Anna K. Pöntinen,
Mona Johannessen,
Kristin Hegstad,
Theresa Wagner
:
Characterization of competition between commensal and clinical strains of Enterococcus faecium
2023
Theresa Wagner
:
AMR insights News Letter: Transiently silent acquired antimicrobial resistance: an emerging challenge in susceptibility testing
AMR insights 05. February 2023 FULLTEKST
Theresa Wagner
:
Bakterienes hemmelige våpen
UiT Forskerhjørnet 2023 FULLTEKST
Espen Morten Viklem Eidum,
Theresa Maria Wagner,
Kristin Hegstad
:
Researchers develop potential vaccine against antibiotic-resistant enterococci
EurekAlert! 2023 FULLTEKST
Trygve Grønning,
Kristin Hegstad,
Theresa Maria Wagner
:
Ny forskning kan stoppe fryktet sykehus-bakterie
NRK Troms og Finmark 2023 FULLTEKST
Theresa Maria Wagner,
Jan Fredrik Frantzen,
Kristin Hegstad
:
Utvikler potensiell vaksine mot antibiotikaresistent sykehusbakterie
NTB 2023 FULLTEKST
Jan Fredrik Frantzen,
Theresa Maria Wagner,
Kristin Hegstad
:
Utvikler potensiell vaksine mot hissig sykehusbakterie
www.forskning.no 2023 FULLTEKST
Theresa Wagner
:
Bacteria hide their resistance – a challenge for diagnostics
AMR insights 15. February 2023 FULLTEKST
Theresa Wagner
:
Aurora bacterialis
2023
Theresa Wagner,
Felipe Romero-Saavedra,
Diana Laverde,
Mona Johannessen,
Johannes Hübner,
Kristin Hegstad
:
Enterococcal Membrane Vesicles as Vaccine Candidates
2023
Ingeborg Mathiesen,
Mona Johannessen,
Kristin Hegstad,
Theresa Wagner
:
Characterisation of putative virulence factors in Enterococcus faecium
2022
Christian Lentz,
Theresa Wagner,
Bhupender Singh,
Md Jalal Uddin,
Gaute Hovde Bø,
Jeanette Grunnvåg
et al.:
Standen "Bli med...som mikrobejeger" på Forskningstorget i Trømso, Forskningsdagene.
2022
Ingeborg Mathiesen,
Mona Johannessen,
Kristin Hegstad,
Theresa Wagner
:
Characterisation of putative virulence factors in Enterococcus faecium
2022
Theresa Wagner,
Jessin Janice James Peter,
Marc Schulz,
Susan A. Ballard,
Anders Goncalves da Silva,
Geoffrey W Coombs
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
Theresa Wagner,
Kristin Hegstad
:
Transiently silenced acquired antimicrobial resistance – an increasing challenge in antimicrobial susceptibility testing
2021
Theresa Wagner,
Mona Johannessen,
Kristin Hegstad
:
Towards a vaccine based on enterococcal membrane vesicles
2020
Theresa Wagner,
Clement Ajayi,
Mona Johannessen,
Kristin Hegstad,
Gro Grimnes,
Ingrid Hemmingsen
:
Brukermøte 2020
2020
Theresa Wagner,
Mona Johannessen,
Kristin Hegstad
:
Investigating the immune response towards enterococcal membrane vesicles.
2019
Theresa Wagner,
Jessin Janice,
Audun Sivertsen,
Ingegerd Sjögren,
Arnfinn Sundsfjord,
Kristin Hegstad
:
The bag of tricks of vancomycin variable enterococci:
an alternative constitutive vanHAX-promoter, varying copy numbers and transferable resistance
2019
Theresa Wagner,
Mona Johannessen,
Kristin Hegstad
:
Investigating the immune response towards enterococcal membrane vesicles
2019
Theresa Wagner,
Clement Ajayi,
Kristin Hegstad,
Mona Johannessen,
Gro Grimnes,
Ingrid Hemmingsen
:
Brukermøte 2019
2019
Theresa Wagner,
Bishnu Joshi,
Jessin Janice,
Fernanda Paganelli,
Rob Willems,
Fatemeh Askarian
et al.:
Virulence factors and antibiotic resistance related proteins are associated with membrane vesicles produced by clinically relevant Enterococcus faecium strains (poster)
2018
Theresa Wagner,
Bishnu Joshi,
Jessin Janice,
Fernanda Paganelli,
Rob Willems,
Fatemeh Askarian
et al.:
Virulence factors and antibiotic resistance related proteins are associated with membrane vesicles produced by clinically relevant Enterococcus faecium strains (talk)
2018
Theresa Wagner,
Audun Sivertsen,
Jessin Janice,
Ingegerd Sjögren,
Arnfinn Sundsfjord,
Kristin Hegstad
:
Vancomycin variable resistance may occur through creation of a novel constitutive vanHAX-promoter by illegitimate recombination
2018
Theresa Wagner,
Kristin Hegstad,
Mona Johannessen,
Torunn Annie Pedersen
:
How to Be a Bad Bug: Virulence Determinants of Enterococcus faecium
UiT Norges arktiske universitet 18. October 2018
Theresa Wagner,
Bishnu Joshi,
Jessin Janice James Peter,
Fatemeh Askarian,
Natasa Skalko-Basnet,
SN Wai
et al.:
Enterococcus faecium releases membrane vesicles containing virulence factors and resistance determinants (poster). Meeting of The National Graduate School in Infection Biology and Antimicrobials (IBA) 2017-11-13 - 2017-11-14 2017.
2017
Theresa Wagner,
Fernanda Paganelli,
Rob Willems,
Mona Johannessen,
Kristin Hegstad
:
A TIR domain protein of Enterococcus faecium interferes with TLR-2 signaling and enhances growth in blood (poster)
2017
Theresa Wagner,
Bishnu Joshi,
Jessin Janice,
Fatemeh Askarian,
Natasa Skalko-Basnet,
Sun Nyunt Wai
et al.:
Enterococcus faecium releases membrane vesicles containing virulence factors and resistance determinants (poster)
2017
Theresa Wagner,
Fernanda Paganelli,
Jessin Janice,
Rob Willems,
Jos Strijp,
Mona Johannessen
et al.:
Tir-domain proteins of nosocomial Enterococcus faecium interfere with TLR-2 signaling and enhance growth in blood (talk)
2017
Theresa Wagner,
Torunn Annie Pedersen,
Mona Johannessen,
Jos Strijp,
Rob Willems,
Fernanda Paganelli
et al.:
Novel putative virulence factors expressed in invasive Enterococcus faecium (poster)
2016
Theresa Wagner,
Mona Johannessen,
Kristin Hegstad
:
Tir-proteins as novel virulence factors in Enterococcus faecium (talk)
2016
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Teaching
BIO3607 Foodsafety
Member of research group
CV
2025- Associate Professor, Seafood Science Research Group, The Norwegian College of Fishery Science, University of Tromsø, Norway
2024-25 Advanced postdoctoral researcher, Host-Pathogen Interactions Research Group, Institute of Veterinary Bacteriology, Vetsuisse Faculty, University of Bern, Switzerland
2019-23 Postdoctoral research fellow, Research Group of Host-Microbe Interactions, Faculty of Health Sciences, Department of Medical Biology, University of Tromsø, Norway; Visiting researcher Dr. von Haunerschen Kinderspital, Ludwig-Maximilians-University Munich, Munich, Germany
2015-18 PhD student, Research Group of Host-Microbe Interactions, Faculty of Health Sciences, Department of Medical Biology, University of Tromsø, Norway; Visiting PhD student Department of Medical Microbiology, University Medical Centre Utrecht, The Netherlands
2014 MSc Biochemistry and Molecular Biology, Max Planck Institute of Colloids and Interfaces, University of Potsdam, Germany