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Researchers from the University of Reading and the Animal and Plant Health Agency tested violet-blue photodynamic inactivation against 64 Campylobacter strains. All were killed in the study, including strains with different antibiotic-resistance profiles, but further trials are needed to establish whether the non-contact, chemical-free method can work reliably on chicken.
Researchers from the University of Reading and the Animal and Plant Health Agency found that a violet-blue light technique killed all 64 Campylobacter strains tested, a result that could inform efforts to reduce contamination on chicken. The study’s findings, reported by Food Safety News on October 9, describe the treatment as a promising option, but say more trials are needed before its practical effectiveness is established.
The researchers tested a method called violet-blue photodynamic inactivation (VB-PDI) against 64 different Campylobacter strains. According to the report, treatment killed every strain, regardless of species or antibiotic-resistance profile. The supplied report does not give the full experimental protocol, the amount of light used or detailed measurements of how much bacteria were reduced.
VB-PDI does not require physical contact with the food and does not involve adding chemicals, according to the report. That makes it a possible approach for reducing bacteria on chicken without directly applying a chemical treatment. However, the reported finding concerns tests against bacterial strains; it does not establish that the technique has been validated for routine use on commercial poultry.
The researchers’ result is an early indication of potential, not evidence that chicken treated this way is safe to eat without ordinary precautions. Campylobacter is killed by thorough cooking, while handling raw chicken can spread bacteria to hands, utensils and ready-to-eat foods. Consumers should continue to prevent cross-contamination and cook poultry properly.
A Potential Tool for Chicken Safety
Campylobacter causes substantial illness, and reducing contamination before chicken reaches consumers could help limit opportunities for exposure. The technique’s reported activity across 64 strains, including strains with different resistance profiles, suggests it may merit further investigation as a food-safety intervention. That finding does not show that VB-PDI prevents infections or that it works equally well across different chicken products and processing conditions.
The non-contact, chemical-free design may be relevant to food processors looking for ways to treat food surfaces. But practical value will depend on whether trials can show consistent bacterial reductions on actual chicken, under realistic processing conditions, without unacceptable effects on product quality or production. Those questions are not answered in the information supplied about the study.
For readers, the immediate implication is limited: the research points to a possible future control measure, not a change to current handling advice. Cooking chicken thoroughly and avoiding cross-contamination remain important because the reported work does not replace those established precautions.
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Campylobacter and Raw Chicken
Campylobacter is described in the report as the most common cause of bacterial gastroenteritis worldwide. In the United Kingdom, there were 70,000 laboratory-confirmed cases in 2024 and 2025, according to the source material. That figure is for the two years combined; the report does not provide a yearly breakdown or a comparison with another period.
Cooking kills Campylobacter, but the report identifies cross-contamination from handling raw meat as a suspected major route of infection. Bacteria can be transferred during preparation if raw poultry or its juices contact hands, kitchen surfaces or food that will not be cooked. The light-treatment study addresses the possibility of reducing bacteria on chicken, rather than changing the advice to handle raw poultry carefully and cook it fully.
The report presents the research as promising but does not provide publication details, a study date, trial conditions or a comparison with existing poultry controls. The reported findings therefore offer an initial signal, while the limits of the available account make it difficult to judge how close the approach is to practical use.
“The use of blue light to reduce Campylobacter on chicken is a promising option but more trials are needed.”
— Food Safety News report on the study
Questions Before Poultry Use
The available report does not specify how the experiments were conducted, how long treatment took, or the degree of bacterial reduction measured beyond saying that every tested strain was killed. It also does not state whether the work involved inoculated chicken, laboratory cultures, or both. Without those details, the results cannot establish how effectively VB-PDI would treat naturally contaminated poultry.
It is also unclear whether the effect persists under commercial processing conditions, how treatment might affect chicken quality, or what equipment and operating costs would be involved. The source says that more trials are needed but gives no timetable, trial design or expected date for further results. The findings do not show that the method is approved for food production or in use by processors.
Further Trials Must Test Chicken
The next step identified in the report is additional trials. To assess whether VB-PDI could have a role in reducing Campylobacter on chicken, further work would need to test performance on food under conditions relevant to processing and examine whether results are consistent across strains and products. The supplied material does not say which trials are planned or when they may be completed.
Until such evidence is available, the findings should be treated as a research result rather than a new consumer safety measure. Any future move toward practical use would depend on evidence about effectiveness and suitability for food processing; no decision or implementation plan is described in the report. In the meantime, consumers should continue to cook poultry thoroughly and take care to prevent raw chicken from contaminating other foods and kitchen surfaces.
Key Questions
What is violet-blue photodynamic inactivation?
Violet-blue photodynamic inactivation (VB-PDI) is the light-based treatment tested by researchers from the University of Reading and the Animal and Plant Health Agency against Campylobacter strains. The supplied report says it does not require physical contact with food or added chemicals, but does not explain its full technical process.
What did the study find?
The report says treatment killed all 64 strains tested, across different species and antibiotic-resistance profiles. It does not provide detailed experimental measurements or establish how well the technique works on chicken in commercial conditions.
Is blue-light-treated chicken available or approved?
The report does not say that the method is approved for food production or in use by poultry processors. It says more trials are needed, so the findings do not establish that treated chicken is available to consumers.
Does the finding change how I should handle chicken?
No change to consumer precautions is reported. Cook chicken thoroughly and prevent raw poultry or its juices from contacting ready-to-eat foods, hands, utensils and surfaces. The study does not show that the light technique replaces safe handling or cooking.
Source: rss
