The peptide based antimicrobial defense is an evolutionarily ancient mechanism of host defense, found in diverse life forms. To date, hundreds of such peptides have been identified, indicating their importance in the innate immune system. Some of these peptides are potent antimicrobials. Mastitis is an important disease causing major economic losses to farmers. The prevention and treatment of mastitis represent a serious burden to producers. In spite of the efforts deployed to control it, the incidence of mastitis continues to be one of the highest of all the cattle diseases. Many...