Experiencing food poisoning is never pleasant. Sometimes you can catch a bad bite early and spit it out, but in other cases, it might take a while before you realize something’s off. Unfortunately, once that tainted food makes its way through your system, there’s often no turning back. You just have to endure the aftermath as your body works to expel whatever toxins or pathogens are lurking, which can sometimes last for days.
We usually rely on proper food storage and preparation to keep food poisoning at bay. But there’s a new development that could add another layer of protection: scientists have discovered a method to actively target and eliminate harmful pathogens before they ruin our meals.
Tracking Down the Threat
When it comes to food poisoning, there are generally two main culprits—toxins or bacterial pathogens. In either case, any contaminated food needs to be disposed of. This is especially crucial with bacteria, as even a minimal amount can multiply rapidly.
Recent research published in Scientific Advances may hold a solution for bacterial food poisoning. Researchers are exploring the use of patches that deliver specially designed viruses to combat bacteria before they can infect and make someone ill from food consumption. The idea is to apply these patches directly to the food, targeting bacteria prior to eating.
The focus here is on bacteriophages—viruses that specifically infect bacteria. When a bacteriophage attaches to a bacterial cell, it injects its genetic material, triggering a cycle where the bacteria produce more phages to subsequently infect other bacteria. In the case of lytic phages, this process leads to the swift destruction of the bacterial cells.
In this study, two specific bacteriophages were utilized. The T7 phage was selected for its effectiveness against Escherichia coli, a common foodborne pathogen. The S.enterica phage was chosen to combat Salmonella enterica, another notorious cause of food poisoning.
To effectively deliver these phages into food, the research team developed an innovative patch system made from food-safe polymers with tiny microneedles capable of penetrating typical food surfaces. When the microneedles perforate the food, they interact with passing bacteria, leading to the bacteria’s destruction and the propagation of more phages. The researchers found that patches made from PMMA polymer offered the best results after experimenting with various materials like PVA, PDMS, and gelatin.
The effectiveness of these patches was striking. In one test with contaminated cooked chicken, the patches eliminated 99.9% of E. coli. A similar test on raw beef showed a reduction of E. coli levels by 99%. These samples could reasonably be regarded as decontaminated. The unique design of the microneedles was crucial, allowing them to penetrate up to a centimeter into the meat, thus maximizing contact with the pathogens inside. In contrast, flat patches were significantly less effective, reducing bacteria levels by only 75%.
This research on employing patches for bacteriophage delivery is fresh, having been published recently in October this year. Nonetheless, utilizing phages for food safety isn’t entirely new; the FDA had already approved bacteriophage products back in 2006, initially for ready-to-eat poultry and meat. While these techniques could be applied across a range of foods, their use remains limited. The U.S. has been more progressive in approving these measures than the European Union, which has yet to allow any bacteriophage applications in food.
Whether these patches will see wider adoption is uncertain. There are challenges to consider; for instance, creating many small holes in food may not appeal to consumers. There’s also the question of how effective the phages would be in real-world conditions and the practicality of dosing for multiple foodborne pathogen strains. Additionally, the technology’s acceptance by the public plays a key role—most people prefer bacteria-free food, but the idea of consuming food with viruses might raise eyebrows.
It might be quite some time before this technology makes its way into everyday food processing, if at all. Still, researchers envision a future where microneedle pads or membranes could be a standard component of food packaging, helping to eliminate harmful bacteria before products reach consumers. This could potentially lead to safer food options on our tables, even if a few pesky bacteria try to sneak in.
