Researchers create packaging tray that warns of contamination before food is unwrapped

Researchers at McMaster University in Canada have created a new packaging tray that can signal when Salmonella or other dangerous pathogens are present in packages of raw or cooked food such as chicken. The new technology will enable producers, retailers and consumers to tell, in real-time, if the contents of a sealed food package are contaminated without having to open it, say the developers.

The prototype tray, shaped like a shallow boat, is lined with a food-safe reagent that allows a built-in sensor to detect and signal the presence of Salmonella. The technology can readily be adapted to test for other common food-borne contaminants, such as E. coli and Listeria, it is claimed. The research has been supported by Toyota Tsusho Canada Inc., an indirect subsidiary of Toyota Tsusho Corporation in Japan...


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