Potential of the polyvalent anti-Staphylococcus bacteriophage K for control of antibiotic-resistant staphylococci...

Area of Science:

• Microbiology
• Bacteriology
• Phage Therapy

Background:

• Antibiotic resistance in Staphylococcus strains, particularly methicillin-resistant S. aureus (MRSA), poses a significant global health threat.
• There is an urgent need for alternative antibacterial strategies beyond conventional antibiotics.

Purpose of the Study:

• To evaluate the efficacy of a specific lytic bacteriophage, designated phage K, against drug-resistant Staphylococcus aureus strains.
• To investigate phage K's ability to overcome bacterial resistance through modification and its potential application in hygiene and topical treatments.

Main Methods:

• In vitro susceptibility testing of phage K against various clinical isolates of resistant Staphylococcus, including MRSA.
• Propagation of phage K on less-sensitive strains to generate modified, more effective phage variants.
• In situ hand wash studies to assess phage K's efficacy in reducing staphylococcal load on human skin.
• Incorporation of phage K into a bismuth-based cream to evaluate its anti-staphylococcal activity.

Main Results:

• Phage K demonstrated lytic activity against a broad spectrum of resistant S. aureus strains, including MRSA and vancomycin-resistant strains.
• Propagation of phage K on initially less-sensitive MRSA strains resulted in modified phages that effectively lysed these strains.
• Hand wash studies showed a 100-fold reduction in staphylococcal numbers on human skin using phage-enriched solutions.
• Phage-infused bismuth cream exhibited significant anti-Staphylococcus activity in vitro.

Conclusions:

• Lytic bacteriophages, like phage K, can be effective against antibiotic-resistant staphylococci.
• Bacterial resistance to phages can be overcome by adapting the phage through serial passage.
• Phage K holds potential for developing novel antibacterial hygiene products and topical treatments to combat resistant staphylococcal infections.