Federal officials say they may never know the source of Salmonella tainted tomatoes that have sickened hundreds of people across the country. Although the US Food and Drug Administration (FDA) continues to search for the genetic fingerprint of the rare Salmonella strain—Salmonella St. Paul—responsible for the illnesses by “tracing the tomatoes back through the supply chain,” there is no guarantee the investigation will yield conclusive results.
“We may not ultimately know the farm where these came from,” Dr. David Acheson, FDA associate commissioner for foods, said. “Some trace-backs that we thought were looking pretty good have been falling apart.” Acheson added that he remained optimistic, but is “trying to be realistic.” According to Acheson, it is also believed that the tainted tomatoes were grown either in Mexico or central or southern Florida. (more…)

