FIG. 3.

Autoradiograms showing Southern blots of EcoRI RFLP typing of whole-cell DNA from representative P. aeruginosa strains hybridized sequentially with each of the six probes lasA, lasB, aprA, exoS, exoU, and ctx. Molecular weight markers in kilobases are indicated to the right of the autoradiograms. The probes and strains examined are as follows: lasA, MK14, MK13, MK9, and PJ39; lasB, AAB1, AAB2, AAB5, and AAB6; aprA, MiE3, MiE2, Mie1, MK40, and MK38; exoS, F6, F7, F8, and F9; exoU, MK11, MK10, MK9, and MK8; and ctx, MiL3, MiL1, MiU2, and MiS3.