Pulsed-field gel electrophoresis patterns of each dominant clonal methicillin-resistant Staphylococcus aureus type isolated during the study period. Lane 1, molecular size ladder; lane 2, infected neonate 1; lane 3, colonized neonate 2; lane 4, colonized HCW 1; lane 5, infected neonate 3; lane 6, colonized neonate 4; lane 7, colonized HCW 2; lane 8, infected neonate 5; lane 9, colonized neonate 6; lane 10, colonized HCW 3; lane 11, infected neonate 7; lane 12, colonized neonate 8; lane 13, molecular size ladder.