Germ warfare: This undated image provided by the Centers for Disease Control and Prevention (CDC) shows Salmonella bacteria in a petri dish. It's about to get faster and easier to diagnose food poisoning, but that progress for individual patients comes with a downside: It could hurt the nation's ability to spot dangerous outbreaks. | The Associated Press

FILE - This Nov. 27, 2012 file photo shows the Sunland Inc. peanut butter and nut processing plant in eastern New Mexico, near Portales, which has been shuttered since late September due to a salmonella outbreak that sickened dozens. It's about to get faster and easier to diagnose food poisoning _ but that progress for individual patients comes with a downside: It could hurt the nation's ability to spot and solve dangerous outbreaks. Next-generation tests that promise to shave a few days off the time needed to tell if E. coli, salmonella or other foodborne bacteria are to blame for a patient's illness could reach medical laboratories as early as next year. (AP Photo/Jeri Clausing, File)

FILE - This Nov. 27, 2012 file photo shows the Sunland Inc. peanut butter and nut processing plant in eastern New Mexico, near Portales, which has been shuttered since late September due to a salmonella outbreak that sickened dozens. It's about to get faster and easier to diagnose food poisoning _ but that progress for individual patients comes with a downside: It could hurt the nation's ability to spot and solve dangerous outbreaks. Next-generation tests that promise to shave a few days off the time needed to tell if E. coli, salmonella or other foodborne bacteria are to blame for a patient's illness could reach medical laboratories as early as next year. (AP Photo/Jeri Clausing, File)