Novel approaches to overcome antibiotic resistance: Phage therapy, nanoparticles, and natural antimicrobials

The escalating crisis of antibiotic resistance worldwide poses considerable dangers to public health, emphasizing the ineffectiveness of traditional antibiotics against multidrug-resistant bacterial strains. Consequently, scientists are working on new strategies that serve as substitutes or complementary techniques to conventional antibacterial therapeutics. Three potential approaches include: phage therapy, nanoparticles, and natural antimicrobials. Phage therapy uses bacteriophages, viruses that particularly target and destroy bacteria, to offer an extremely exclusive, versatile, and self-replicating treatment alternative. Both polymeric and metal-based nanoparticles demonstrate promising antibacterial activities through different mechanisms, including cell membrane degradation, oxidative stress generation, biofilm synthesis inhibition, and improved drug delivery by working synergistically with other antibiotics. Nanoparticles can also be manipulated to enhance selectivity and decrease toxic effects. Plant, algae, and animal- derived natural antimicrobials comprise a wide variety of structurally distinct compounds offering antimicrobial activities against a broad spectrum of bacteria, including interfering with the mechanisms of resistance development. Progress in genomics, biotechnology, and nanoscience is opening new pathways of innovation, improvement, and administration of these new substances. This review highlights the modes of action, recent clinical studies, and possible therapeutic applications of these alternative strategies, underlining their role in overcoming the problems of antibiotic resistance.