NBC新闻:这种长叶莴苣可能致命

With just one day to go before Thanksgiving, a warning. Your romaine Lettuce could be deadly. The CDC urging Consumers to throw away any romaine Grown in California Salinas Valley, including packaged mixes, then sanitize the refrigerator. 67 people in 19 states have now been sickened in this latest outbreak.

Investigators still don't know what is causing the contamination with a toxic strain of E.coli bacteria. A similar outbreak last year led to a ban on all romaine. Since then, the industry has sought ways to trace outbreaks. Contaminated groundwater one possible culprit. Tonight the CDC says a full Scale investigation is underway as millions sit down to a thanksgiving minus the romaine.