Antimicrobial Bacterial Metabolites: Properties, Applications and Loading in Liposomes for Site-specific Delivery.

The high levels of antibiotic resistance registered worldwide have become a serious health problem, threatening the currently available treatments for a series of infectious diseases. With antibiotics becoming less and less effective, it is becoming increasingly difficult and, in some cases, impossible to treat patients with even common infectious diseases, such as pneumonia. The inability to meet the ever-increasing demand to control microbial infection requires both the search for new antimicrobials and improved site-specific delivery. On the one hand, bacterial secondary metabolites are known for their diverse structure and antimicrobial potential and have been in use for a very long time in diverse sectors. A good deal of research is produced annually describing new molecules of bacterial origin with antimicrobial properties and varied applications. However, very few of these new molecules reach the clinical phase and even fewer are launched in the market for use. In this review article, we bring together information on these molecules with potential for application, in particular, for human and veterinary medicine, and the potential added value of the use of liposomes as delivery systems for site-specific delivery of these drugs with the synergistic effect to overcome the risk of antibiotic resistance.

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