Effects of various concentrations of synthetic brevinin-2SSb (red lines), ranatuerin-2SSa (green lines), and granuliberin-SSa (blue lines) on the growth of animal pathogenic Gram-negative bacteria (A–C), Gram-positive bacteria (D,E), and the fungus (F). Cells of Escherichia coli (A), Salmonella enterica (B), Pseudomonas aeruginosa (C), Staphylococcus aureus (D), Bacillus cereus (E), or Candida albicans (F) were incubated with serially diluted brevinin-2SSb, ranatuerin-2SSa, or granuliberin-SSa for 20 h at 35 °C. Points and vertical bars represent means and standard error of the mean (SEM), respectively (n = 4). In all panels except (D), values with the same letters are not significantly different (p ≥ 0.05). The G. susurra peptides were not active against the Gram-positive bacterial strains.