Abstract
The global rise of antibiotic resistance represents one of the most pressing threats to human and animal health, limiting treatment options and reducing the effectiveness of antimicrobials. Bacteriophages, viruses that specifically infect and destroy bacteria, have re-emerged as highly adaptable antimicrobials, valued for their precision in targeting pathogens, ability to replicate at infection sites, and minimal disruption of beneficial microbiota.
In human medicine, phage therapy is increasingly investigated as a solution for multidrug-resistant infections unresponsive to conventional antibiotics. Clinical and compassionate-use cases report successful outcomes against Pseudomonas aeruginosa, Staphylococcus aureus, and Escherichia coli, including strains resistant to carbapenems and colistin. Promising results have been achieved in chronic wound infections, bacteremia, urinary tract infections, and pulmonary infections in cystic fibrosis patients. Evidence suggests that phages may act not only as a last-resort therapy but also as effective adjuvants to antibiotics, improving bacterial clearance while limiting resistance development.
In veterinary medicine and animal production, phages are applied more selectively as biocontrol tools to limit zoonotic and antimicrobial-resistant bacteria in livestock environments. Their ability to disrupt biofilms on farming and food-processing surfaces underscores their potential in enhancing food safety, although primarily as targeted interventions rather than broad-spectrum solutions.
In addition, phage therapy is gaining recognition in companion animal medicine, where multidrug-resistant infections increasingly challenge veterinary practice. Successful applications in treating skin, wound, and gastrointestinal infections in pets suggest that phages may soon complement or replace antibiotics in small animal care.
Collectively, these developments position bacteriophages as versatile and sustainable tools, supporting a One Health strategy to combat antimicrobial resistance in human, veterinary, and environmental domains.