Close but no cigar

According to the New York Times, the FDA may never be able to pinpoint exactly where all the salmonella-tainted tomatoes came from: "We may not ultimately know the farm where these came from", Dr. David Acheson, the agency’s associate commissioner for foods, told reporters in a conference call. "Some trace-backs that we thought were looking pretty good have been falling apart." The tainted tomatoes were probably grown in Mexico or central or southern Florida, Dr. Acheson said. The agency is looking for the genetic fingerprint of the rare strain of salmonella responsible for the illnesses, tracing the tomatoes back through the supply chain.