Comparison of the banding patterns from randomly amplified polymorphic DNA PCR assays of sequential B pseudomallei isolates from each of the cases. Comparison of the banding patterns from randomly amplified polymorphic DNA PCR assays of sequential B pseudomallei isolates from each of the cases. The RAPD result shown is for the L10a primer set. Lanes 2–12, case 1; lanes 13 and 14, case 4; lanes 17–19, case 3; and lanes 20–25, case 2. Lanes 1, 15, 16, and 26 = 100 bp molecular weight ladder. M R O’Carroll et al. Thorax 2003;58:1087-1091 Copyright © BMJ Publishing Group Ltd & British Thoracic Society. All rights reserved.