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Microbiological shelf-life testing

Project title: Microbiological shelf-life testing – new approaches
Member Funded Research project number: 144031

Why are we undertaking this project?

Establishing an accurate shelf-life is key to a product’s success. The shelf-life should allow the product to be economically viable and minimise waste whilst maintaining key sensory, chemical and microbiological characteristics. It is therefore vital that the correct procedure is used when assessing shelf-life.

What are we doing as part of this project?

Setting up working groups comprising producers, retailers and – potentially - government bodies to reconsider the methods and procedures used to define microbiological shelf-life. This includes conducting practical studies to define the best practice approaches and recommendations. Guidance will subsequently be updated and released.

Current status of the project

In the first year of this project a working group was set up consisting of manufacturers, retailers and government bodies. They provided guidance on the updating of Guideline 46 (Evaluation of the shelf-life of chilled foods). The scope of the guideline has been extended to cover foods other than chilled and background information on why particular storage temperatures have been recommended.

A survey of 35 domestic fridges was carried out to provide some information on what temperature is most applicable for the consumer period of shelf-life. It was found that 53% of fridges were above 5°C and, whilst 84% were 8°C or below, 16% of fridges were running above 8°C. A practical study using cooked sliced ham stored at various time/temperature regimes has also been carried out and has shown that there can be a big difference in achievable shelf-life depending on the regime followed. The next stage is to look at open shelf-life and the effect on microflora types and levels when products are stored in consumers fridges.


Project timeline

Microbiological shelf-life testing – new approaches

Jan 2018 - Dec 2020

Project outputs

Related categories to this project

Microbiology Shelf life