The South Carolina Department of Corrections (DOC) reported large outbreaks of gastroenteritis in women and men facilities. Both facilities were served by one kitchen. The lunch meal served on March 2, was consumed by 91% of the female case-patients and by 88% of the male case-patients. For that meal, only tuna salad with egg was associated with illness in both facilities. Salmonella Enteritidis (SE) phage types 2 and 13a were isolated from these case-patients. During February-March 2001 two additional SE outbreaks in DOC facilities involving phage types 2 and 13a occurred. The eggs supplied to the DOC during February-March were all traced back to one distributor. In February 2001, SE phage types 2, 13a, 22, 23, and 28 were identified at this egg distributor. Subsequently the DOC switched to pasteurized eggs.