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. 2003 Sep 26;5:189–196. doi: 10.1251/bpo61

Fig. 3. Distinct waves of swarm fronts formed against several antibiotics.

Fig. 3

More than one zone of growth inhibition was seen on swarm plates (NBG, 0.5% agar) against ceftazidime (TZ), piperacillin (PP), and ciprofloxacin (CI). The arrows indicate the presence of initial and secondary swarm fronts.