Research output per year
Research output per year
Personal profile
Description of research and teaching
Key research interests
Cold-tolerant LAB and Enterobacteriaceae as food spoilage organisms
Food safety aspects of cold-tolerant bacterial communities
Taxonomy and species diversity of psychrotrophic LAB and Enterobacteriaceae
Metabolic pathways associated with food spoilage
Contamination routes of spoilage bacteria in food processing
Adaptation and survival of food spoilage bacteria
Genomics, metagenomics and metatranscriptomics of food spoilage populations
Teaching
Intrinsic and extrinsic factors related to microbial growth in foods
Microbial taxonomy and classification
Sensory evaluation and microbial analyses of foods for quality determination
Contamination of foods with spoilage microbes
Microbial ecology of foods
Curriculum vitae
Short curriculum vitae
Education and training
Doctor of Veterinary Medicine (Finnish ELL) College of Veterinary Medicine, Helsinki, Finland 1990
PhD (Finnish ELT) Faculty of Veterinary Medicine, University of Helsinki 1997
Certificate of Proficiency in English, University of Cambridge, Local Examinations Syndicate 1997
Approbatur studies in university pedagogics, University of Helsinki 2002
Diplomate of the European College of Veterinary Public Health 2005
Specialist degree in leadership training (JET-koulutus, Haaga-Perho) 2006
The National Defence Course 188 / 2009
Academic posts
Assistant veterinarian (assistentti) 1997
Senior assistant veterinarian (yliassistentti) 1998
Docent in Food Hygiene (elintarvikehygienian dosentti) 1999
Professor of Food Hygiene (elintarvikehygienian professori) 2002
Main positions of trust
Vice-Rector, research and researcher training 2008-2013
The first Vice Dean of the Faculty of Veterinary Medicine 2004-2007
Fields of Science
- 413 Veterinary science
- 1183 Plant biology, microbiology, virology
- 416 Food Science
International and National Collaboration
Publications and projects within past five years.
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A bacteriolysin of Lactococcus carnosus is potentially involved in mediating contact-dependent antagonism against Listeria monocytogenes
Tareb, R., Reze, S., Harb, M., Dubreil, L., Monnet, V., Björkroth, J., Passerini, D., Leroi, F. & Pilet, M.-F., 28 May 2025, In: Scientific Reports. 15, 1, 15 p., 18595.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
Microsporidian infection of mosquito larvae changes the host-associated microbiome towards the synthesis of antimicrobial factors
Trzebny, A., Taylor, A. D., Herren, J. K., Björkroth, J. K., Jedut, S. & Dabert, M., 17 May 2025, In: Parasites & vectors. 18, 1, 14 p., 178.Research output: Contribution to journal › Article › Scientific › peer-review
Open Access -
Comparative genomics of 40 Weissella paramesenteroides strains
Wan, X., Takala, T. M., Huynh, A. V., Ahonen, S. L., Paulin, L., Björkroth, J., Sironen, T., Kant, R. & Saris, P., 31 Mar 2023, In: Frontiers in Microbiology. 14, 11 p., 1128028.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
Marination increased tyramine levels in rainbow trout fillet strips packaged under modified atmosphere
Jaaskelainen, E., Sade, E., Ronkko, T., Hultman, J., Johansson, P., Riekkola, M.-L. & Bjorkroth, J., Feb 2023, In: Food Microbiology. 109, 6 p., 104099.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile -
Microbiological quality and safety of vacuum-packaged white-tailed deer meat stored at 4 °C
Sauvala, M., Johansson, P., Björkroth, J. & Fredriksson-Ahomaa, M., 14 Feb 2023, In: International Journal of Food Microbiology. 390, 5 p., 110110.Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile
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Walter Ehrström_Manninen Julia
Björkroth, J. (Project manager)
01/06/2025 → 31/12/2025
Project: Foundations (Private Foundations, Non-Profit Foundations, Charitable Trusts)
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WE 2025/Björkroth
Björkroth, J. (Project manager)
01/05/2025 → 30/04/2026
Project: Foundations (Private Foundations, Non-Profit Foundations, Charitable Trusts)
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SenSpoil: Human perception of volatilomes produced by microbiomes spoiling perishable foods
Björkroth, J. (Project manager) & Hissaria, T. S. (Participant)
01/01/2024 → 31/12/2027
Project: Research Council of Finland: Academy Project
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NNF Distinguished investigator
Björkroth, J. (Project manager), Johansson, P. (Participant), Jääskeläinen, E. (Participant), Manninen, J. A. (Participant), Niinivirta, H. A. (Participant), Nushi, E. (Participant) & Punom, T. M. (Participant)
01/05/2020 → 02/12/2026
Project: Foundations (Private Foundations, Non-Profit Foundations, Charitable Trusts)
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WE 2022/Björkroth
Björkroth, J. (Project manager)
01/03/2022 → 31/12/2023
Project: Foundations (Private Foundations, Non-Profit Foundations, Charitable Trusts)
Prizes
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Knight, First Class, of the Order of the White Rose of Finland
Björkroth, J. (Recipient), 2008
Prize: Prizes and awards
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Silver medal of the University of Helsinki
Björkroth, J. (Recipient), 8 Sept 2014
Prize: Prizes and awards
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Activities
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MATINE (External organisation)
Björkroth, J. (Board member)
1 Dec 2019 → 1 Dec 2022Activity: Membership types › Membership or other role in national/international committee, council, board
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Ruokavirasto (External organisation)
Björkroth, J. (Board member)
23 Jan 2019 → 31 Dec 2020Activity: Membership types › Membership or other role in national/international committee, council, board
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EVIRA (Finnish Food Safety Authority Evira) (External organisation)
Björkroth, J. (Board member)
1 Mar 2017 → 31 Dec 2018Activity: Membership types › Membership or other role in national/international committee, council, board
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Evaluation of Emilia Norlund (ad personam) as docent
Björkroth, J. (Participant)
9 Aug 2017Activity: Other activity types › Types for other activities - Other
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PhD thesis of Amelie Rougier
Björkroth, J. (Opponent)
27 Jul 2017Activity: Examination types › Opponent of doctoral dissertation
Press/Media
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What will happen after the coronavirus crisis? The University of Helsinki prepares for the post-pandemic period
Kurhila, J., Toivonen, T. & Björkroth, J.
22/04/2020
2 items of Media coverage
Press/Media: Press / Media
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The University of Helsinki’s University Collegium elected
Saikku, M., Mäkelä, T., Fagerstedt, K., Tammela, P., Olkkola, K., Björkroth, J. & Mykkänen, A.
19/02/2018
1 item of Media coverage
Press/Media: Press / Media
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Yle tutki juomapullojen pöpöt – Näin vaikutat pullosi puhtauteen
02/02/2017
1 Media contribution
Press/Media: Press / Media
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Interview for the Finnish Veterinary Journal (Suomen Eläinlääkärilehti): Eläinlääkäri yliopiston johdossa (Veterinarian at the University management)
20/09/2013
1 Media contribution
Press/Media: Press / Media