Provided are peptides, modified peptides, fragments thereof, conjugates thereof, and polymers thereof that have
antibacterial activity, including against multidrug-
resistant bacteria. In some embodiments, the peptides include
amino acid sequences as set forth in any of SEQ ID NOs: 2-151, modified peptides, fragments, and conjugates thereof, and any combination thereof. The peptides, modified peptides, fragments, and conjugates can be
polymer-functionalized, encapsulated in a particle, embedded in and / or on a
solid support, impregnated in a dressing, and / or is formulated for use in a
nebulizer, for topical administration, and / or for
systemic administration. Also provided are medical devices having an
antibacterial agent embedded in and / or associated with a support layer, and methods for inhibiting growth of and / or killing
bacteria, for treating or preventing
community and / or nosocomial infections, for treating bacterial infections present in wounds, for treating pulmonary infections, for treating or preventing systemic bacterial infections, and for combination therapies with conventional
antibiotics.