http://www.foxbusiness.com/story/traceback-problem-salmonella-saintpaul-outbreak/ :

"Disputing these calls are the facts: Yesterday the Minnesota Star Tribune reported that the Minnesota Department of Health had traced the source of their outbreak in less than two weeks. According to the article, Minnesota health officials "were on the phone July 9 with their federal counterparts making it 'crystal clear' it was not tomatoes but jalapenos that were the likely source."
"Traceback is not the issue here," says Western Growers' President and CEO Tom Nassif. "The FDA and CDC initially claimed that tomatoes were the culprit. Now they are focusing on jalapenos. Were they looking in the wrong place? If so, no system of traceback, no matter how sophisticated would have made a difference in this two-month-long investigation." Corroborating this point, in an Associated Press article published today, Dr. David Acheson of the FDA was reported to dispute that an electronic records system would have helped investigators. "