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Researchers from the University of Reading and the Animal and Plant Health Agency tested violet-blue photodynamic inactivation on 64 Campylobacter strains. All were killed in the study, but further trials are needed to assess the technique as a way to treat chicken.
Researchers from the University of Reading and the Animal and Plant Health Agency report that a violet-blue light treatment killed all 64 Campylobacter strains they tested, including strains with different species and antibiotic-resistance profiles. The findings suggest the contact-free, chemical-free technique could be tested as a way to reduce the bacteria on chicken, but more trials are needed before its practical effectiveness is established.
The method, called violet-blue photodynamic inactivation (VB-PDI), uses light to target bacteria without physically contacting the food or adding chemicals. The study assessed its effect on 64 different Campylobacter strains. According to the report, treatment killed every strain tested, regardless of species or antibiotic-resistance profile.
The result is a laboratory finding, not evidence that the technique is already being used commercially or that it prevents human illness. The report describes blue light as a promising option for chicken, while stressing that further trials are needed. It does not provide details such as the treatment duration, the light dose, the extent of bacterial reduction, or how the method performed on chicken under processing conditions.
Campylobacter is a major foodborne pathogen. The report says it is the most common cause of bacterial gastroenteritis worldwide. In the UK, there were 70,000 laboratory-confirmed cases across 2024 and 2025; the source does not give separate annual totals. Cooking kills the bacteria, but handling raw meat can spread it to other foods or surfaces before cooking.
A Potential Extra Step for Chicken Safety
If later trials show VB-PDI can reliably reduce Campylobacter on chicken, it could offer food producers a treatment that does not require direct physical contact with the food or the addition of chemicals. That would make it a possible additional control point, rather than a replacement for established food-safety practices.
The public-health relevance lies in the gap between contamination on raw poultry and safe cooking at home. Campylobacter is killed by cooking, but bacteria can spread during preparation. Any treatment intended to lower contamination before chicken reaches consumers could be relevant to that risk. The current findings do not show how much risk would be reduced, whether the method affects chicken quality, or whether it can be applied consistently at scale.
For now, the study supports further investigation, not a change to consumer guidance. People should continue to handle raw chicken carefully and cook it thoroughly; the research does not establish that treated chicken would be safe to eat without normal precautions.
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From Strain Testing to Food Trials
The reported work tested VB-PDI against a range of bacterial strains, including differences in species and antibiotic-resistance profile. The breadth of the panel is relevant because it suggests the observed effect was not limited to a single strain. However, the report does not identify the individual strains or provide a breakdown of results by type.
The study was conducted by scientists at the University of Reading and the Animal and Plant Health Agency. Food Safety News reported the findings on October 9, 2026. The report characterizes the method as promising but says additional trials are required, leaving questions about performance on chicken and in settings beyond the tests described.
Campylobacter can be present on raw poultry, while cooking kills it. The report identifies cross-contamination during raw-meat handling as a major suspected route of infection. That distinction matters: a treatment aimed at reducing bacteria on chicken could address contamination earlier in the food chain, but it would not remove the need for safe storage, careful handling, and thorough cooking.
“The use of blue light to reduce Campylobacter on chicken is a promising option but more trials are needed.”
— Food Safety News, summarizing the study findings
How the Treatment Performs on Chicken
The report does not specify the light dose or exposure time, the measured reduction in bacteria, or the conditions under which the 64 strains were tested. It also does not say whether trials have shown the same effect on chicken itself, rather than on the strains in the study setting.
There is no information in the report about impacts on taste, appearance, shelf life, cost, production speed, or worker safety. It does not describe a commercial deployment, regulatory assessment, or a comparison with existing poultry controls. The finding that every tested strain was killed should not be read as proof the approach will work equally well across all strains or real-world conditions.
The researchers’ detailed conclusions and a timeline for further testing are not included in the source material. The scale of any eventual public-health benefit therefore remains unknown.
Further Trials Must Establish Practical Use
The report says more trials are needed, but gives no schedule or specific next study. Further testing would need to establish whether the light treatment reliably reduces Campylobacter on chicken, how the effect varies under food-processing conditions, and what treatment settings are needed.
Additional evidence would also be needed on effects on product quality and on whether the method can be incorporated safely and consistently into poultry processing. Until those questions are addressed, VB-PDI remains a research option rather than an established intervention. Consumers should continue following standard raw-chicken handling and cooking guidance.
Key Questions
What is violet-blue photodynamic inactivation?
VB-PDI is a light-based technique tested against Campylobacter. The report says it does not require physical contact with food or added chemicals.
What did the researchers find?
The study tested 64 Campylobacter strains and reported that the treatment killed every strain, across species and antibiotic-resistance profiles. The report does not provide a detailed reduction measurement.
Is blue-light treatment being used on chicken now?
The source does not report commercial use. It describes the technique as a promising option and says more trials are needed.
Does this mean consumers can handle or cook chicken differently?
No. The findings do not establish that the technique has been applied to chicken in real-world conditions or that it replaces standard precautions. Handle raw chicken carefully and cook it thoroughly.
Why is Campylobacter a food-safety concern?
The report describes Campylobacter as the most common cause of bacterial gastroenteritis worldwide and identifies cross-contamination from raw meat handling as a major suspected infection route.
Source: rss
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