Cracking Listeria’s Secrets

We know a lot about the crafty and resilient microbe, but it remains a deadly threat.

One day in August 2011, Penny Hauser spied a bin of fresh cantaloupes at a grocery store in Colorado Springs, Colorado. “Mike loves cantaloupe,” she thought. While recovering from a grueling bone marrow transplant, her 68-year-old spouse had dropped 30 pounds. Now he was on high-dose corticosteroids and eager to eat. So as Mike enjoyed the melon later that day, Penny inwardly cheered. But weeks later, something was wrong. “It was a Saturday night, and Mike was watching colle...

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