SMAP 29, a bactericidal antimicrobial peptide and a cleavage product from the C-terminus of an ovine cathelicidin prepropeptide, is effective against P. aeruginosa strain PAO1 in both low- and high-salt conditions, as demonstrated in an energy-dependent luminescence assay with half-maximal effective concentrations (EC50s) of 0.05 and 0.06 µM, respectively. Additionally, it induces hemolysis in ovine red blood cells in a concentration-dependent manner.