16AGRITECHCAT5: Bacteriophage Management of On-Farm Salmonella Contamination of Vine Fruits

Lead Research Organisation: University of Leicester
Department Name: Infection Immunity and Inflammation

Abstract

Salmonella spp. are one of most important foodborne pathogens worldwide, and incidences caused by contaminated food
of non-animal origin have been increasing over the last decade, reflecing rising consumers' demands for fresh/minimallyprocessed
fruit and vegetables. Crops where a post-harvest management period takes place outside are particularly at risk.
project focuses on Salmonella contamination of vine fruits (raisins, sultanas), which are dried outside post harvest and
exposed to fouling by birds. The impacts throughout the supply chain are signifcant, from the grower to the retailer, for
example the product recall costs in the UK are estimated to be at least £500K per year. It is difficult to remove Salmonella
from vine fruits using existing technologies and we propose to develop a novel and bespoke product based on
bacteriophages (phages) that specifically target this pathogen and that can be applied during the on farm processing of the
fruit. The Lead Organisation in the proposal: APS Biocontrol Ltd. [APS] has already developed an innovative technology for
plant pathogen control, based on safe, naturally-occurring, highly specific phages. This project will see APS team with a
UK academic, Prof Martha Clokie from the University of Leicester who has led several Reseach Council and Charitable
Trust funded bacteriophage reseach and development projects, and who has experience and expertise in working with both
Salmonella and phages. APS and the Leicester team will work together in order translate APS' technology to prevent onfarm
crop contamination by Salmonella. Whilst the technology will be applied mainly outside of the UK, financial benefits
will be realised in the UK: improved food security, reduced wastage and increased trade. The consortium combines
technology specialists (APS), academic experts (Leicester), a major producer (Community Foods) and the UK's market
leader in dried fruit sales (Tesco), who will encourage technology pull-through by using the phage product on the vine fruits
that they sell.The focus of our work is the vine fruit industry (raisins and sultanas), where contamination with pathogens (mainly
Salmonella) can have catastrophic effects throughout the supply chain. Vine fruits represent half of the global dried fruit
supply chain (2014 value: $7,470m - a 5% increase on 2013), wih UK companies representing 15-20% of this market both
by imports and by growing through partners. Currently only a relatively small amount of of the vine fruits are tested for
Salmonella contamination, but as the scale of this Industry-wide problem of Salmonella contamination of vine fruits is
appreciated, this is likely to change. Increased testing will reveal the full extent of the problem which will lead to significant
further financial impact on the industry.In order to address this problem, we are an industrially-driven multi-partner consortium and will develop a technologyenabled, strategic innovation for managing Salmonella contamination, with treatments based on formulations of naturallyoccurring, highly-specific and environmentally-acceptable agents phages. The project will involve technology translation from academia, laboratory-scale development and pilot field trials. The project is in line with the UK Strategy for Agricultural Technologies through translating research into practice. It will develop and exploit a biocontrol technology in the UK, led by an innovative SME. The technology has the potential to reach global markets, with significant return to the UK Agri-Tech
industry, benefiting UK research and production, the country's export and import businesses, as well as the retail industry.
Also, the focus on new biocontrols aligns with EU policy to reduce the impact of pesticide use on people's health and the
environment. It also aligns with recommendations for a better analysis of the prevalence of food-borne pathogens and
relevant implementation of Good Agricultural Practice.

Technical Summary

As above

Planned Impact

This project directly addresses a key challenge in global primary crop production; bacterial contamination of crops postharvest
(pre-farm gate) - specifically, those having an outside drying period on-farm, exposed to potential fouling
contamination by animals, which can have significant implications to downstream processing and human health. We will
achieve this through targeted, bespoke biocontrol applications, "evaluating the technical feasibility of an idea and
establishing proof-of-concept and potential routes to exploitation"; the key remit of the Industrial Research Awards. The
project will therefore impact both "primary crop and livestock production" and "addressing challenges in downstream food
processing" (with a solution within primary production), aligning with a number of the suggested topic areas within this call;
e.g. crop harvesting and storage, sustainability of production methods, reducing adverse impacts on the environment and
limiting human health issues.
The main impact of this work will be for the vine fruit industry (raisins, sultanas), where contamination with pathogens
(mainly Salmonella) can have catastrophic effects throughout the supply chain. Vine fruits represent half of the global dried
fruit supply chain (2014 value: $7,470m - a 5% increase on 2013), wih UK companies representing 15-20% of this (imports
and growing through partners). An industrially-driven multi-partner consortium will develop a technology-enabled, strategic
innovation for managing Salmonella contamination, with treatments based on formulations of naturally-occurring, highlyspecific
and environmentally-acceptable agents (bacteriophage). The project will involve technology translation from
academia, laboratory-scale development and pilot field trials.
The project is in line with the UK Strategy for Agricultural Technologies through translating research into practice. It will
develop and exploit a biocontrol technology in the UK, led by an innovative SME. The technology has the potential to reach
global markets, with significant return to the UK Agri-Tech industry, benefiting UK research and production, the country's
export and import businesses, as well as the retail industry. Also, the focus on new biocontrols aligns with EU policy to
reduce the impact of pesticide use on people's health and the environment (Directive 2009/128/EC). It also aligns with
recommendations for a better analysis of the prevalence of food-borne pathogens and relevant implementation of Good
Agricultural Practices (EFSA). The consortium combines technology specialists (APS), academic experts (Leicester), a major producer (Community Foods) and the UK's market leader in dried fruit sales (Tesco), who will encourage technology
pull-through.
 
Description We have discovered phages that target the strains of interest so we can now begin to develop a phage product as we intended.

We have tested the phages on the sultanas and shown that they survive on the fruit whilst drying.

We are currently in the process of doing more trials for efficacy.

We are also working on the formulation of the final product.
Exploitation Route Not yet.
Sectors Agriculture, Food and Drink

 
Description ACTACC Annual Scientific Meeting 2021 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach National
Primary Audience Professional Practitioners
Results and Impact Gave plenary talk to UK heart and lung anaesthetists at their annual meeting in Glasgow
Year(s) Of Engagement Activity 2022
URL https://www.actacc.org/meetings-and-events
 
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Part Of Official Scheme? No
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Primary Audience Professional Practitioners
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Year(s) Of Engagement Activity 2022
 
Description Department of Evolutionary and Environmental Biology, University of Haifa 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Professional Practitioners
Results and Impact Seminar
Year(s) Of Engagement Activity 2022
 
Description IV Paranaense Congress of Microbiology - Brazil (virtual) 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Postgraduate students
Results and Impact Talk to Brazilian scientists
Year(s) Of Engagement Activity 2022
 
Description Office of Biodefense, Research Resources and Translational Research/DMID/NIAID (Joe Campbell), USA on animal phage studies informing human trials 
Form Of Engagement Activity A formal working group, expert panel or dialogue
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Professional Practitioners
Results and Impact N/A
Year(s) Of Engagement Activity 2022
 
Description Talk to Bogaziçi University Science Club (Turkey) 
Form Of Engagement Activity Participation in an activity, workshop or similar
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Undergraduate students
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Year(s) Of Engagement Activity 2022
 
Description Talk to international vine fruit meeting in Seville 
Form Of Engagement Activity Participation in an activity, workshop or similar
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Industry/Business
Results and Impact To promote our work within the relevant vine fruit industry - potential collaboration with fruit producers from South Africa
Year(s) Of Engagement Activity 2018
 
Description Virtual FIS (Federation of Infection Societies) 2021 Conference hosted by the British Infection Association 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Professional Practitioners
Results and Impact 15 min presentation (pre-recorded on Oct 21) + 30 min Q&A
Part of the session - Future Proofing Antibiotic Resistance: Alternatives to Antibiotic Discovery
Year(s) Of Engagement Activity 2022
URL https://www.britishinfection.org/events/fis-conference
 
Description Viruses of Microbes poster presentation 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Other audiences
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Year(s) Of Engagement Activity 2018