when it was cut. It also is possible that because precut melon sits around a while before being eaten, the bacteria has an opportunity to grow, she said. She said people who want to avoid infection from fruits should wash them first and eat them soon after preparation.
"We are seeing more of these types of outbreaks in the past couple of years," said Jenny Lay, an epidemiologist with the Foodborne and Diarrheal Disease Branch of the CDC's National Center for Infectious Diseases. She concurred basic food safety steps -- such as washing food -- could reduce the risk of infections.
Other researchers looked at the process of heating lettuce to increase its shelf life. By dipping iceberg lettuce into warm water baths, the vegetable resists brown discoloration.
However, Larry Beuchat, research professor of food safety at the University of Georgia, Athens, found the treatment also apparently facilitates growth of Listeria monocytogenes, an organism that can cause severe infections, during storage at refrigeration temperature.
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