Southern hybridization of ST-32 isolates with ISBcen20 (A) and ISBcen8 (B) probes. Samples are as follows: lanes 1, BCC0817; lanes 2, BCC0818; lanes 3, BCC0961; lanes 4, BCC0851; lanes 5, BCC0896; lanes 6, BCC0885; lanes 7, BCC1110; lanes 8, BCC1114; lanes 9, BCC1111; lanes 10, BCC1112; lanes 11, BCC1113; lanes 12, BCC1121; lanes 13, BCC1126; lanes 14, BCC1128; lanes 15, reference strain J2315 (ST-28). The approximate positions of the molecular size markers (in kilobases) from the agarose gel electrophoresis of the DNA are indicated to the left of each gel.