Navigasjon

  • Hopp til innhold
NTNU Hjemmeside NTNU Hjemmeside

ntnu.edu

  • Studies
    • Master's programmes in English
    • For exchange students
    • PhD opportunities
    • All programmes of study
    • Courses
    • Financing
    • Language requirements
    • Application process
    • Academic calendar
    • FAQ
  • Research and innovation
    • NTNU research
    • Research excellence
    • Strategic research areas
    • Innovation resources
    • PhD opportunities
  • Life and housing
    • Student in Trondheim
    • Student in Gjøvik
    • Student in Ålesund
    • For researchers
    • Life and housing
  • About NTNU
    • Contact us
    • Faculties and departments
    • Libraries
    • International researcher support
    • Vacancies
    • About NTNU
    • Maps
  1. Employees

Språkvelger

Norsk

Gunn Merethe Bjørge Thomassen

Last ned pressefoto
Last ned pressefoto
Foto:

Gunn Merethe Bjørge Thomassen

Post doc

gunn.m.thomassen@ntnu.no
73412524 +4790148980 Akrinn, T02.551, Kalvskinnet, Sverresgate 12
Om Forskning Publikasjoner Undervisning Formidling

Om

I have a master's degree in technology (siv.ing) with a specialization in biotechnology. Furthermore, a PhD in the field of microbial environment in salmon slaughterhouses. My research activity is mainly related to microbiology and food safety in food production environments, but I also have experience from research on protection against biological threats. 

Research interests:

  • Microbial environment in food production systems
  • Foodborne pathogenic bacteria
  • Listeria monocytogenes 
  • Hydroponic cultivation of food plants
  • Circularity in food production/Re-use of waste streams

Kompetanseord

  • Biofilm
  • Forringelsesbakterier
  • Holdbarhet
  • Hydroponisk dyrking av matplanter
  • Listeria monocytogenes
  • Matmikrobiologi
  • Mikrobielle miljø
  • Mikrobiologi
  • Patogene bakterier
  • Salmonella

Forskning

Through most of my professional career I have worked within the field of microbiology, with pathogenic bacteria and how they pose a threat to humans. And the aim in several of the projects I have worked on has been to gain more knowledge about the microorganisms in focus, to be able to develop strategies to prevent people being harmed by them. In my research I use both conventional microbiological methods, molecular methods and sequencing based methods and, I am working on improving my knowledge and skills within bioinformatics and analyzing large amounts of data. In food microbiology, conventional microbiological methods have been of outermost importance for a long time, and they still are. However, molecular methods and new sequencing technologies are emerging. All these methods have their strengths and weaknesses and I see them as complementary to each other rather than ranging one above the other.

In my Phd thesis I studied the development and dynamics of resilient bacterial communities in the processing environment in a newly opened salmon processing facility. I investigated the problems associated with biofilm and persistence of Listeria monocytogenes and how this is linked to other bacteria as for example Pseudomonas spp.

Currently I work as a Post doc in the project “Hydroponic Plant Cultivation on a Lunar Base Using Nutrient Sources from Human Waste”, where my research responsibility is on the food safety in the hydroponic cultivated plants.

I am also partisipating in a newly started Gemini center called VertiGrow, where we have gathered expertice from diverse disciplines related to vertical cultivation of food in controlled environments.

  • Forskningsgruppe for Matvitenskap

LunarPlant: Hydroponic Plant Cultivation on a Lunar Base Using Nutrient Sources from Human Waste

Prosjektet skal studere komplekse responser hos planter dyrket hydroponisk med næringskilder laget av menneskelig avfall, samt å utvikle infrastruktur for bærekraftig hydroponisk plantedyrking i verdensrommet.

Optimal utnyttelse av havets matressurser (OPTiMAT)

OPTiMAT vil ha hovedfokus i den delen av verdikjeden som innbefatter ressursene etter at de er tatt opp fra havet og innovative løsninger for å bearbeide disse til trygge og lønnsomme forbrukerprodukter av høy kvalitet.

Kartlegging av listeria i sjøfasen ved produksjon av atlantisk laks (TRACEListeria)

Prosjektet skal øke kunnskapen om fôr, oppdrett og dets betydning for kontaminering av L. monocytogenes i verdikjede laks ved å dokumentere smitteveier for L. monocytogenes fra fôrprodusenter via matfiskanlegg og videre til ferdig pakket fisk.

Publikasjoner

  • Kronologisk
  • Etter kategori
  • Se alle publikasjoner i Cristin

2023

  • Thomassen, Gunn Merethe Bjørge; Reiche, Thorben; Hjørungnes, Martinus; Mehli, Lisbeth. (2023) High Disinfectant Tolerance in Pseudomonas spp. Biofilm Aids the Survival of Listeria monocytogenes. Microorganisms
    Academic article

2022

  • Thomassen, Gunn Merethe Bjørge; Mehli, Lisbeth. (2022) Gjenstridige bakteriesamfunn i lakseslakteri. Norsk Sjømat
    Popular scientific article
  • Thomassen, Gunn Merethe Bjørge; Krych, Lukasz; Knøchel, Susanne; Mehli, Lisbeth. (2022) Bacterial community development and diversity during the first year of production in a new salmon processing plant. Food Microbiology
    Academic article
  • Thomassen, Gunn Merethe Bjørge. (2022) Resilient bacterial communities in a salmon processing environment - The impact on food safety. NTNU Open
    Doctoral dissertation
  • Thomassen, Gunn Merethe Bjørge; Reiche, Thorben; Tennfjord, Christine Eikås; Mehli, Lisbeth. (2022) Antibiotic Resistance Properties among Pseudomonas spp. Associated with Salmon Processing Environments. Microorganisms
    Academic article

2021

  • Reiche, Thorben; Mehli, Lisbeth; Thomassen, Gunn Merethe Bjørge. (2021) Phenotypic and Genotypic Characterization of Antimicrobial Resistance in Pseudomonas spp. isolated from the Salmon industry. NTNU
    Masters thesis
  • Thomassen, Gunn Merethe Bjørge; Krych, Lukasz; Knøchel, Susanne; Mehli, Lisbeth. (2021) ON-rep-seq as a rapid and cost-effective alternative to whole-genome sequencing for species-level identification and strain-level discrimination of Listeria monocytogenes contamination in a salmon processing plant. MicrobiologyOpen
    Academic article
  • Bringsli, Renate; Mehli, Lisbeth; Thomassen, Gunn Merethe Bjørge. (2021) Antimicrobial resistance and biofilm formation among Pseudomonas spp., Serratia spp. and Aeromonas spp. isolated from Norwegian Farmed Salmon . NTNU
    Masters thesis

2020

  • Umutoni, Noelle; Jakobsen, Anita Nordeng; Mukhatov, Kirill; Thomassen, Gunn Merethe Bjørge; Karlsen, Hanne; Mehli, Lisbeth. (2020) Occurrence, diversity and temperature-dependent growth kinetics of Aeromonas spp. in lettuce. International journal of food microbiology
    Academic article
  • Boyko, Viktoriya; Mehli, Lisbeth; Thomassen, Gunn Merethe Bjørge. (2020) Identifisering av, og biofilmegenskaper blant, Pseudomonas spp. fra et lakseslakteri – påvirkning på vekst og overlevelse av Listeria innocua. NTNU
    Masters thesis

2019

  • Bremvåg, Maja; Mehli, Lisbeth; Thomassen, Gunn Merethe Bjørge. (2019) Forekomst av Listeria spp. i et nyetablert prosesseringsanlegg for laks. NTNU
    Masters thesis

2018

  • Lerfall, Jørgen; Thomassen, Gunn Merethe Bjørge; Jakobsen, Anita Nordeng. (2018) Quality of fresh saithe (Pollachius virens) in modified atmosphere packages as affected by the gas composition. Food Packaging and Shelf Life
    Academic article

2016

  • Mehli, Lisbeth; Hoel, Sunniva; Thomassen, Gunn Merethe Bjørge; Jakobsen, Anita Nordeng; Karlsen, Hanne. (2016) The prevalence, genetic diversity and antibiotic resistance of Staphylococcus aureus in milk, whey, and cheese from artisan farm dairies. International Dairy Journal
    Academic article

Tidsskriftspublikasjoner

  • Thomassen, Gunn Merethe Bjørge; Reiche, Thorben; Hjørungnes, Martinus; Mehli, Lisbeth. (2023) High Disinfectant Tolerance in Pseudomonas spp. Biofilm Aids the Survival of Listeria monocytogenes. Microorganisms
    Academic article
  • Thomassen, Gunn Merethe Bjørge; Mehli, Lisbeth. (2022) Gjenstridige bakteriesamfunn i lakseslakteri. Norsk Sjømat
    Popular scientific article
  • Thomassen, Gunn Merethe Bjørge; Krych, Lukasz; Knøchel, Susanne; Mehli, Lisbeth. (2022) Bacterial community development and diversity during the first year of production in a new salmon processing plant. Food Microbiology
    Academic article
  • Thomassen, Gunn Merethe Bjørge; Reiche, Thorben; Tennfjord, Christine Eikås; Mehli, Lisbeth. (2022) Antibiotic Resistance Properties among Pseudomonas spp. Associated with Salmon Processing Environments. Microorganisms
    Academic article
  • Thomassen, Gunn Merethe Bjørge; Krych, Lukasz; Knøchel, Susanne; Mehli, Lisbeth. (2021) ON-rep-seq as a rapid and cost-effective alternative to whole-genome sequencing for species-level identification and strain-level discrimination of Listeria monocytogenes contamination in a salmon processing plant. MicrobiologyOpen
    Academic article
  • Umutoni, Noelle; Jakobsen, Anita Nordeng; Mukhatov, Kirill; Thomassen, Gunn Merethe Bjørge; Karlsen, Hanne; Mehli, Lisbeth. (2020) Occurrence, diversity and temperature-dependent growth kinetics of Aeromonas spp. in lettuce. International journal of food microbiology
    Academic article
  • Lerfall, Jørgen; Thomassen, Gunn Merethe Bjørge; Jakobsen, Anita Nordeng. (2018) Quality of fresh saithe (Pollachius virens) in modified atmosphere packages as affected by the gas composition. Food Packaging and Shelf Life
    Academic article
  • Mehli, Lisbeth; Hoel, Sunniva; Thomassen, Gunn Merethe Bjørge; Jakobsen, Anita Nordeng; Karlsen, Hanne. (2016) The prevalence, genetic diversity and antibiotic resistance of Staphylococcus aureus in milk, whey, and cheese from artisan farm dairies. International Dairy Journal
    Academic article

Rapport

  • Thomassen, Gunn Merethe Bjørge. (2022) Resilient bacterial communities in a salmon processing environment - The impact on food safety. NTNU Open
    Doctoral dissertation
  • Reiche, Thorben; Mehli, Lisbeth; Thomassen, Gunn Merethe Bjørge. (2021) Phenotypic and Genotypic Characterization of Antimicrobial Resistance in Pseudomonas spp. isolated from the Salmon industry. NTNU
    Masters thesis
  • Bringsli, Renate; Mehli, Lisbeth; Thomassen, Gunn Merethe Bjørge. (2021) Antimicrobial resistance and biofilm formation among Pseudomonas spp., Serratia spp. and Aeromonas spp. isolated from Norwegian Farmed Salmon . NTNU
    Masters thesis
  • Boyko, Viktoriya; Mehli, Lisbeth; Thomassen, Gunn Merethe Bjørge. (2020) Identifisering av, og biofilmegenskaper blant, Pseudomonas spp. fra et lakseslakteri – påvirkning på vekst og overlevelse av Listeria innocua. NTNU
    Masters thesis
  • Bremvåg, Maja; Mehli, Lisbeth; Thomassen, Gunn Merethe Bjørge. (2019) Forekomst av Listeria spp. i et nyetablert prosesseringsanlegg for laks. NTNU
    Masters thesis

Undervisning

Emner

  • MATV3006 - Bachelor Thesis
  • TMAT201P - Internship

In the spring semester of 2024, I held approximately half of the lectures in the course TBT4110 Microbiology, which is part of several different study programs at the Faculty of natural science. In the autumn semester i taught the Quality Management section of the course MATV3003 Food Safety and Quality Management, which is a mandatory part of the Bachelor program in Food science, technology and sustainability.

I have been teaching laboratory courses in microbiology, biotechnology, and general chemistry at Bachelor level through a period of eight years (2013-2020). In addition, I taught one time a laboratory course in safe food production at Master level. Additionally, I have been holding single lectures on Genetically modified organisms within the subject Food technology for third year students. One semester (autumn 2016) I had the teaching responsibility for two subjects in the Vocational Teacher Education and for a smaller part of a third subject. This included preparing and holding all the lectures in the relevant topics, evaluating exercises, conduct the laboratory exercises, preparing and evaluating exams.

Veiledning

During my PhD I was the co-supervisor for six Master students and three Bachelor groups that were doing work related to my Phd-project. In my current position as Postdoc I have been the co-supervisor for four Bachelor groups and two Master students.

I am always interested in taking on new students that wants to do their thesis within my field of research.

Formidling

2024

  • Academic lecture
    Thomassen, Gunn Merethe Bjørge. (2024) Persistence of foodborne pathogens during hydroponic cultivation of lettuce on nutrients based on source-separated urine. International Committee on Food Microbiology and Hygiene FoodMicro 2024, 28th International ICFMH Conference , Burgos 2024-07-08 - 2024-07-11

2023

  • Poster
    Thomassen, Gunn Merethe Bjørge; Sandberg, Martin; Jakobsen, Øyvind Mejdell; Schiefloe, Mona; Kittang, Ann-Iren; Mehli, Lisbeth. (2023) Growth and survival of bacterial pathogens in plant nutrient solutions based on human waste. EFFoST 37th EFFoST International Conference 2023 , Valencia 2023-11-06 - 2023-11-08
  • Lecture
    Thomassen, Gunn Merethe Bjørge. (2023) Hydroponic Plant Cultivation on a Lunar Base Using Nutrient Sources from Human Waste. Teagasc Food Bioscience, V1 Internal group meeting, Teagasc Food Bioscience , Fermoy 2023-12-08 - 2023-12-08
  • Lecture
    Thomassen, Gunn Merethe Bjørge. (2023) Mattrygghet i hydroponisk dyrking av salat ved bruk av næring fra «human waste ». Agritech Cluster Fremtidige muligheter med bærekraftige matsystem , Digitalt 2023-02-14 -

2022

  • Lecture
    Thomassen, Gunn Merethe Bjørge. (2022) Gjenstridige bakteriesamfunn i lakseslakteri - Betydning for mattryggheten. Lerøy Midt AS Bedriftsmøte , Hitra 2022-09-09 - 2022-09-09
  • Academic lecture
    Lerfall, Jørgen; Hoel, Sunniva; Krych, Lukaz; Jakobsen, Anita Nordeng; Hannisdal, Atle; Duister, Ingrid Malien. (2022) Tracing Listeria monocytogenes in the production chain of Atlantic salmon (Salmo Salar L.) . FoodMicro2022 , Athen 2022-08-28 - 2022-08-31
  • Academic lecture
    Lerfall, Jørgen; Hoel, Sunniva; Krych, Lukaz; Jakobsen, Anita Nordeng; Hannisdal, Atle; Duister, Ingrid Malien. (2022) Tracing Listeria monocytogenes in the production chain of Atlantic salmon (Salmo Salar L.) . Norges forskningsråd og FHF Havbruk22 , Bergen 2022-10-19 - 2022-10-21
  • Poster
    Thomassen, Gunn Merethe Bjørge; Hjørungsnes, Martinus; Reiche, Thorben; Bringsli, Renate; Mehli, Lisbeth. (2022) Mixed Pseudomonas spp . biofilm aids Listeria monocytogenes to survive disinfection. International Committee on Food Microbiology and Hygiene Food Micro 2022 - Next generation challenges in Food Microbiology , Athens, Greece 2022-08-28 - 2022-08-31

2021

  • Poster
    Thomassen, Gunn Merethe Bjørge; Krych, Lukas; Knøchel, Susanne; Mehli, Lisbeth. (2021) Efficient strain-level discrimination of the food pathogen Listeria monocytogenes. EFFoST 35th EFFoST International Conference , Lausann, Switzerland 2021-11-01 - 2021-11-04

2018

  • Poster
    Thomassen, Gunn Merethe Bjørge; Mehli, Lisbeth. (2018) Microbial contamination of fish processing plants . Bits PILANI / Sintef REfood , Goa 2018-02-08 - 2018-02-09

2017

  • Poster
    Thomassen, Gunn Merethe Bjørge; Lerfall, Jørgen; Jakobsen, Anita Nordeng; Mehli, Lisbeth. (2017) Profiling spoilage bacteria in lightly processed saithe (Pollachius virens). European Federation of Food Science and Technology (EFFoST) 31st EFFoST International Conference , Sitges 2017-11-13 - 2017-11-16

NTNU – Norges teknisk-naturvitenskapelige universitet

  • For ansatte
  • |
  • For studenter
  • |
  • Innsida
  • |
  • Blackboard

Studere

  • Om studier
  • Studieprogram
  • Emner
  • Videreutdanning
  • Karriere

Aktuelt

  • Nyheter
  • Arrangement
  • Jobbe ved NTNU

Om NTNU

  • Om NTNU
  • Bibliotek
  • Strategi
  • Forskning
  • Satsingsområder
  • Innovasjon
  • Organisasjonskart
  • Utdanningskvalitet

Kontakt

  • Kontakt oss
  • Finn ansatte
  • Spør en ekspert
  • Pressekontakter
  • Kart

NTNU i tre byer

  • NTNU i Gjøvik
  • NTNU i Trondheim
  • NTNU i Ålesund

Om nettstedet

  • Bruk av informasjonskapsler
  • Tilgjengelighetserklæring
  • Personvern
  • Ansvarlig redaktør
Facebook Instagram Linkedin Snapchat Tiktok Youtube
Logg inn
NTNU logo