Antimicrobial peptides (part of an innate immune response found among all classes of life) are effective against a wide range of microorganisms. And even if their effect is not as strong as that of commonly used antibiotics (ATBs), it appears that, in contrast to ATBs, antimicrobial peptides may trigger or amplify the immune response. Cathelicidin is classified as an AMP. It is part of the human immune system and acts as a natural antibiotic, able to disrupt the bacterial cell membrane and destroy bacteria.