FIG. 2.

Motility of B. pseudomallei filaments on semisolid agar. Filaments were induced with 0.5 μg of ceftazidime per ml, 4 μg of ofloxacin per ml, or 8 μg of trimethoprim per ml for either 6 or 16 h. At the end of the 6 or 16 h, the antibiotics were removed and the filaments were allowed to revert in antibiotic-free broth for 10 h. Controls not treated with any antibiotics were tested in parallel and were processed in the same way as the treated bacteria. Bars, 1 cm.