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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, but the technique remains a promising option rather than an established food-safety intervention; further trials are needed.
Researchers from the University of Reading and the Animal and Plant Health Agency found that a violet-blue light treatment killed all 64 Campylobacter strains tested, including strains with different antibiotic resistance profiles. The technique, which does not require direct contact with food or added chemicals, could offer a way to reduce the bacteria on chicken, but more trials are needed before its effectiveness in practical food-processing settings is established.
The scientists tested a method called violet-blue photodynamic inactivation, or VB-PDI, against 64 different Campylobacter strains. According to the report, the treatment killed every strain in the test, regardless of species or antibiotic resistance profile. The available account does not provide the experimental conditions or numerical results beyond the number and range of strains tested.
VB-PDI uses light to target bacteria. The report says the method does not require physical contact with the food or the addition of chemicals. Researchers describe its potential application as reducing Campylobacter on chicken, but the findings do not establish how well the approach would work on commercial production lines, across different chicken products, or under routine operating conditions.
The report characterizes blue-light treatment as a promising option, while stressing that further trials are required. The study findings therefore point to a possible control method, not a replacement for existing food-safety practices or evidence that treated chicken is safe to handle or eat without standard precautions.
A Potential Control Point for Chicken
Campylobacter is the most common cause of bacterial gastroenteritis worldwide, according to the supplied report. In the United Kingdom, it records 70,000 laboratory-confirmed cases across 2024 and 2025. A method that could reduce the bacteria on chicken may matter because raw poultry can carry the pathogen and handling it can spread contamination to hands, utensils, or other foods.
The suggested advantage of VB-PDI is that it acts without touching the food or adding chemicals, which could make it worth testing as an additional processing-stage intervention. But the study’s finding that all tested strains were killed is not, by itself, proof of reduced illness in consumers. The report gives no evidence about real-world reductions in contamination or infections, so the public-health effect remains unmeasured.
For households, the finding does not change current precautions. Campylobacter is killed by thorough cooking, but cross-contamination from raw meat remains a concern. Consumers should continue to handle raw chicken carefully and keep it away from ready-to-eat foods; the light treatment has not been shown here to remove the need for those steps.
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Why Raw Chicken Is in Focus
The report identifies chicken as the food application under study and says cross-contamination from handling raw meat is thought to be a major route of Campylobacter infection. Although cooking kills the bacterium, contamination can spread before cooking if raw chicken or its juices contact hands, equipment, or foods that will not be cooked.
The work involved researchers from the University of Reading and the Animal and Plant Health Agency. Its reported result covers 64 strains in a study; it does not describe a deployed technology, regulatory approval, or a change to food-handling guidance. The distinction matters: laboratory or controlled testing can identify a promising approach, while practical adoption depends on additional testing in relevant settings.
““Every strain was killed by the treatment, regardless of species or antibiotic resistance profile.””
— Food Safety News report on the study
Questions Before Food-Plant Use
The supplied report does not detail how the treatment was conducted, the light exposure or duration used, or the size of the reduction measured. It also does not say whether the tests were carried out on chicken itself or only on bacterial strains under controlled conditions. Those details are needed to judge how closely the result reflects food-processing conditions.
It remains unclear how effective VB-PDI would be on different chicken products, whether it can be applied consistently at commercial scale, and how it would fit with existing controls. The report does not provide results from consumer-health studies, cost information, or a timetable for additional trials. The finding that all 64 tested strains were killed should not be interpreted as proof that every Campylobacter strain, or bacteria on every treated food item, would be eliminated.
Further Trials Will Test Practicality
The immediate next step identified in the report is more trials to evaluate the approach. The supplied material does not name a planned study, give a schedule, or say whether researchers intend to test the method on chicken under commercial processing conditions.
Further evidence would need to show whether the treatment reliably reduces Campylobacter on food in realistic settings and whether that reduction can be achieved without compromising the product or disrupting processing. Until results from such trials are available, the technique remains a research-stage possibility, while cooking and measures to prevent raw-meat cross-contamination continue to be relevant precautions.
Key Questions
What is violet-blue photodynamic inactivation?
Violet-blue photodynamic inactivation (VB-PDI) is the light-based method tested by the researchers against Campylobacter. The report says it does not require physical contact with food or added chemicals, but it does not provide further technical details.
What did the study find?
The researchers tested 64 different Campylobacter strains, and the report says every strain was killed by the treatment, regardless of species or antibiotic resistance profile.
Is blue-light treatment already being used on chicken?
The supplied report presents VB-PDI as a promising option that needs more trials. It does not say the method is in routine commercial use or has received regulatory approval.
Does this change how people should handle raw chicken?
No change to food-handling advice is reported. Cook chicken thoroughly and prevent raw meat or its juices from contaminating hands, utensils, or ready-to-eat foods. The study does not show that light treatment removes the need for these precautions.
Source: rss
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