Thumbnail of Pulsed-field gel electrophoresis patterns of XbaI-digested multidrug-resistant Salmonella Newport. Lane 2, pattern MA-JJP0036; lane 3, pattern MA-JJP 0027; lane 6, pattern MA-JJP0062; lane 7, pattern MA-JJP0077; lane 8, pattern MA-JJP0089; lane 9, pattern MA-JJP0034; lane 11, pattern MA-JJP0050; lane 13, pattern MA-JJP0070.