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Swarming ability of the S. enterica ATCC 14028 wild-type strain (wt) and the wild-type Kmr (wt Kmr), recAo6869 (recAo), lexA3(Ind−), and recAo6869 lexA3(Ind−) mutant derivatives. Bacterial colony swarming patterns as they appeared on a semisolid (Difco) agar surface following incubation of the cultures for 24 h at 37°C are shown.
