A, S. typhimurium growth curves. Three strains of Salmonella including wild type, S. typhimurium complemented fliI and SJW2702 (ΔfliI) were grown in Luria-Bertani broth at 37°C with aeration. Bacterial growth was determined by OD600. Data were obtained from the average of three independent experiments; B, specific growth rate of three strains.