Biopreservation of raw and minimally processed food with bacteriophages, protective cultures and bacteriocins (nisin) — instead of chlorine washes and part of synthetic preservatives

Replaces: chlorine washes and part of synthetic preservatives · Products: raw and minimally processed foods · Evidence: high for specific targets

The chemical problem#

Chlorine washes are the standard sanitizer for fresh-cut produce and (outside the EU) poultry carcasses. They form chlorate and trihalomethanes. EFSA (2015) found chlorate exposure a concern for infants and children (iodine uptake inhibition), and the EU set chlorate MRLs in 2020. Chlorine loses activity quickly in organic-rich water, so pathogen cross-contamination still happens. Synthetic preservatives face consumer demand for “clean label”.

Product overview#

1. Bacteriophages: viruses that infect only specific bacteria.
   • Listeria phages (e.g. PhageGuard Listex P100, ListShield): approved as processing aids or GRAS in the USA and other countries (the EU situation varies by use). Applied to RTE meats, cheese surfaces, fish and fresh-cut produce.
   • Salmonella phages (e.g. PhageGuard S, SalmoFresh) for poultry meat and produce.
   • E. coli O157 phages for beef hides and trimmings.
2. Protective cultures: lactic acid bacteria (e.g. Lactobacillus sakei, Carnobacterium spp., Lactococcus) added to meat, fish or cheese. They outcompete Listeria and spoilage organisms without changing the product.
3. Bacteriocins: nisin (E234, from Lactococcus lactis fermentation), pediocin (from Pediococcus-fermented ingredients). Used in processed cheese, dairy desserts and meat products.
4. Organic acids from fermentation (lactate, acetate, “cultured dextrose”, vinegar) as clean-label preservatives.
5. Washes: peracetic acid and electrolysed water have fewer by-products (not bio, but lower risk), combined with phages.

Active ingredient / Composition#

Lytic phage preparations (typically 10⁸–10⁹ PFU/mL, applied to reach about 10⁷ PFU/cm² on the surface; per product); LAB protective cultures (about 10⁶–10⁷ CFU/g); nisin (typically 1–25 mg/kg, per food regulation).

Key facts#

Advantages#

• Targets the pathogen without chlorate or THM by-products.
• Phages remain active against antibiotic-resistant bacteria.
• Protective cultures prolong shelf life and allow reduced synthetic preservatives.
• Nisin has more than 50 years of safe use.

Mode of action#

• Phages: attach to specific receptors, inject DNA, replicate and lyse the bacterial cell.
• Protective cultures: competition, lactic acid, bacteriocins and hydrogen peroxide.
• Nisin: binds lipid II, forming pores in Gram-positive bacteria (Listeria, Clostridium, Bacillus spores).

Application#

Limitations#

• Phages are strain-specific; cocktails and quality control are needed. EU authorization of phages as processing aids is not harmonized (country-level).
• Protective cultures must match the product (flavour, pH).
• Biopreservation supplements, and does not replace, GMP, cold chain and HACCP.

Evidence of displacement — D1: works, adoption not proven#

Verified figures (the number is in the quoted sentence and the sentence is on the source page):

• displacement — 68% of food producers are replacing artificial preservatives with bacteriocins or protective cultures. (global, 2025; weak: industryresearch.biz)
• driver — Around 72% of global food manufacturers are now reformulating products to eliminate synthetic preservatives. (global, 2025; weak: industryresearch.biz)
• performance — In a simulated commercial cold chain study in Nigeria, bacteriophage P100 achieved a 4.2 log reduction of L. monocytogenes, while the combination of P100 and nisin achieved a 5.1 log reduction, significantly outperforming individual treatments. (Nigeria, 2022-2023; peer-reviewed: exa.ai)
• performance — Approximately 42% of food manufacturers have integrated protective cultures into their production processes to extend shelf life and reduce chemical preservatives. (global, 2025; weak: industryresearch.biz)

Industry pioneers — companies that commercialised this substitution#

Suppliers — real products and services (from the vendor index)#

Companies below are active vendors in the vendor index whose own card (profile / official website) shows this product or service — matched 2026-09-28 by keyword and checked by hand against the card text. Being listed is not an endorsement; open each card for evidence, contacts and status.

Government funding signals#

Public grants for a specific technology are a leading indicator: governments fund what regulators want to replace and what is close to practical adoption. Searched on 2026-09-27 in: EU CORDIS (FP7, Horizon 2020, Horizon Europe), US federal awards (USAspending: USDA NIFA/ARS/APHIS/Forest Service, EPA, DOE, NOAA, USAID; plus NSF and NIH), UK UKRI Gateway to Research, Australian Research Council. Each grant below was reviewed by hand for relevance. China, Brazil and India are covered in the subsection below (publication-acknowledged grants). Not covered: Russia (RSF, FASIE — not reachable from the research environment) and national agencies outside these databases. Amounts are the funder’s contribution as recorded (US NIH/UKRI: per award or fiscal year).

Signal: Moderate. 2 relevant grant(s) · about €7.2M in total · jurisdictions: EU.

China, Brazil, India — national research grants acknowledged in publications#

Chinese, Brazilian and Indian funders have no open grant databases reachable here, so this measures scientific papers published since 2015 that acknowledge national government grants, taken from the grant numbers publishers deposit with Crossref. Only papers whose title contains this article’s key terms are counted (a conservative lower bound; “100+” = search window full). It shows research-funding intensity, not budgets. Funders: China — NSFC, National Key R&D Program, China Agriculture Research System; Brazil — CNPq, CAPES, FAPESP, Embrapa, FAPEMIG; India — DBT, DST, ICAR, SERB, CSIR, BIRAC. Rating per country: Strong ≥50 papers · Moderate 10–49 · Weak 1–9.

Scientific evidence#

• Carlton RM, Noordman WH, Biswas B, de Meester ED, Loessner MJ (2005). Bacteriophage P100 for control of Listeria monocytogenes in foods: genome sequence, bioinformatic analyses, oral toxicity study, and application. Regulatory Toxicology and Pharmacology 43: 301–312.
• Sulakvelidze A (2013). Using lytic bacteriophages to eliminate or significantly reduce contamination of food by foodborne bacterial pathogens. Journal of the Science of Food and Agriculture 93: 3137–3146.
• Delves-Broughton J, Blackburn P, Evans RJ, Hugenholtz J (1996). Applications of the bacteriocin, nisin. Antonie van Leeuwenhoek 69: 193–202.
• EFSA CONTAM Panel (2015). Risks for public health related to the presence of chlorate in food. EFSA Journal 13(6): 4135.

Bioeconomy value#

Viruses, bacteria and fermentation peptides replace chlorine chemistry, and they are produced in bioprocessing facilities. This is a “clean-label” food bioeconomy.