Effects of Curosurf (A), Alveofact (B), Survanta (C), Exosurf (D), and Pumactant (E) on the in vitro growth of different bacterial strains. A total of 7 × 107 CFU of bacteria per ml were incubated with different concentrations of surfactant (1, 10, and 20 mg/ml) or without surfactant (saline) for 5 h at 37°C. Values are mean [Δ(5 h, 0 h)] log10 CFU/ml ± the SD obtained from six experiments. ∗, P < 0.01 versus saline.