Analytical and Laboratory

New Weapon in the Fight Against Food Contamination

14 August 2017

Image credit: American Society for MicrobiologyImage credit: American Society for MicrobiologyPlastic film may be the secret weapon in the fight against food contamination, according to research published in the journal Applied and Environmental Microbiology.

According to the research, plastic film can kill the bacteria found in biofilms—an accumulation of bacteria that significantly increases antimicrobial resistance. According to the study,"...biofilms are the leading cause of cross contamination of food and non-food materials upon contact with contaminated surfaces."

"We tested the modified plastic films using two relevant foodborne pathogens—Escherichia coli, and Listeria," said corresponding author Nitin Nitin, PhD, Professor and Engineer, Departments of Food Science and Technology and Biological and Agricultural Engineering, University of California, Davis. "The tests were conducted to evaluate prevention of biofilm formation, as well as treatment of pre-formed biofilms."

The plastic films are incorporated with “N-halamines”—composed of nitrogen, a chlorine atom and other possible elements—that can kill bacteria on contact or by releasing bacteria-killing chlorine.

"Many food borne disease outbreaks can be traced back to cross-contamination of food with pathogenic bacteria," said Dr. Nitin. "Currently, we do not have an active approach to continuously prevent deposition of bacteria during food processing operations, and can only remove these deposits after processing—during a cleaning shift. Similar risks exist in the hospital environment."

Because traditional sanitizers can’t always treat areas of potential contamination, the researchers believe that the plastic films are versatile and can take on many different shapes, "such as conveyor belts, self-sanitizing globes, plastic bins for food transport, or a plastic mat for biomedical tools. Furthermore, these plastic films can be easily added to existing equipment as a lining material."

For more on this research, click here.



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