Cold temperature key to bagged salad quality.

Emerging Food R&D Report | September 1, 2008 | Copyright

We love the convenience of purchasing fresh, bagged salads. Today, sales of fresh-cut lettuce and leafy greens total about $3 billion annually, and the demand is increasing. But the increased demand also comes with new challenges, affirmed by outbreaks of E. coli O157:H7-related illnesses traced to bagged fresh produce. Cutting fresh produce when it is harvested removes natural protective barriers, exposing cut surfaces to potential contaminants.

Plant operators generally use cleaning treatments to wash surfaces and reduce cross-contamination from environmental ...

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