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Avoid Toxic Bacteria This Fall: Refrigerate Those Caramel Apples

October 24, 2015: 12:00 AM EST
U.S. researchers have found that a dangerous bacterium known as Listeria monocytogenes increased 1,000-fold on a favorite fall treat: unrefrigerated caramel apples with sticks. By contrast, listerial growth was delayed on caramel apples without sticks stored at room temperature for three days. Refrigeration was the key difference, the scientists said. Caramel apples with sticks had no listerial growth for up to a week, and only a little growth over the next three weeks. Those without sticks had no listerial growth during four weeks of storage.
Craig et al., "Growth of Listeria monocytogenes within a Caramel-Coated Apple Microenvironment", Blog entry, study to be published in October 2015 issue of mBio, October 24, 2015, © Craig et al.
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