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Stomach Bug Outbreak Grows, Bagged Salad Implicated

Health officials in Iowa, Nebraska point to salad mix as culprit, but CDC has not confirmed a source

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"Our food supply system is large, complex and centralized. We get foods from all over the world, and they are packaged together and sent very, very quickly," Hirsch said. "I look at large outbreaks like this, and it makes me wonder if more locally grown foods would be safer."

People who want to avoid infection should thoroughly wash all their fruits and vegetables, Hirsch said. They also should wash cooking surfaces and utensils with hot, soapy water.

"For the most part, it's a miserable nuisance, but the concern I have as a doctor is for patients whose immune systems are weakened [and] have a real hard time with this infection," Hirsch said. He urged extra caution for people undergoing cancer treatment, recovering from an organ transplant or dealing with HIV infection.

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