Tracking Produce Proves Complex
The salmonella outbreak of 2008 may go down in history as the case of the missing tomatoes.
More than six weeks ago, the Food and Drug Administration issued a warning about a salmonella outbreak in New Mexico and Texas connected to raw tomatoes. Since then, the agency has expanded the warning nationwide and added jalapeno and serrano peppers. More than 1,100 people have fallen ill since April, but not a single contaminated tomato or pepper has been found.
Investigators said the complexity of the produce distribution system has been their biggest impediment, and some produce industry leaders agree that tracing fruits and vegetables could be easier. Though the technology to do so already exists in the form of bar codes that appear on nearly everything we buy, it could take as long as five years before the entire food industry applies it to food safety.
Produce outbreaks are notoriously hard to trace. In at least half of all produce outbreaks, health officials have never determined what made people sick. The short shelf life of most fresh fruits and vegetables means it's less likely the items will still be in people's refrigerators when investigators come looking. Plus, there are the many paths produce can take to reach consumers.
In the salmonella probe, health officials said the practice of repacking made it harder to trace tomatoes to their source. Repacking involves sorting produce for size and color to meet a customer's specifications. Fresh tomatoes are often repacked, sometimes more than once. For investigators, the practice can open a multitude of new leads. Investigators trying to find the source of contaminated jalapenos have run into "the same spider web," said David Acheson, a top food safety official at the FDA.
For some produce industry leaders, references to spider webs sound like excuses for mistakes in judgment. "We are not dealing with failure of traceability. We are dealing with the fact that the trace-back did not support the single point of contamination hypothesis," said Tom Stenzel, president of United Fresh Produce Association. "We would submit that trace-back worked; we just weren't listening carefully enough to what it was telling us."
Other industry leaders agree with regulators that the faster investigators can trace products, the quicker they will be able to prove or disprove theories, thereby limiting an outbreak's scope and financial losses for businesses.
