NEW : Discovery called a `` significant break '' in outbreak investigation . Strain is Salmonella Saintpaul , which has sickened hundreds recently . The strain was first identified last year and the CDC said it had been found at several restaurants across the country. Learn about the differences between salmonella and E. coli » Pepper grown in Mexico , but origin of bacteria uncertain . Bacteria were found at distribution center in McAllen , Texas .
NEW : Discovery called a `` significant break '' in outbreak investigation . Strain is Salmonella Saintpaul , which has sickened hundreds recently . The strain was first identified last year and the CDC said it had been found at several restaurants across the country. Pepper grown in Mexico , but origin of bacteria uncertain . Bacteria were found at distribution center in McAllen , Texas .