Synopsis: Salmonella with a unique genetic fingerprint is providing an intriguing clue to federal investigators trying to find out how it got into products at Georgia peanut processing plants 73 miles and two years apart. The fingerprint, which caused an outbreak in 2006-07, has recently been identified in some peanut butter made last year at Peanut Corporation of America's plant in Blakely, Ga. This is raising questions about whether greater efforts are needed on peanut farms to reduce bacterial contamination, even though peanuts aren't intended to be eaten raw. Salmonella's 'fingerprint' could be clue to its source
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