Inmates in four South Carolina prisons developed gastroenteritis. Stool specimens from ill inmates yielded Salmonella Enteritidis phage types 2, 13a, and 23. No staff members from the prisons had been ill. Eggs used by the four prison had been supplied from a single vendor. Eggs from this vendor were tested and found to contain Salmonella Enteritidis phage types 2, 13a, 22, 23, and 28. Phage type 2 was the predominant Salmonella Enteritidis strain found in the eggs and isolated from the inmates. The South Carolina Department of Corrections subsequently switched to pasteurized egg products in April.