Bacteriophage Isolation, Purification, and Characterization Techniques Against Ubiquitous Opportunistic Pathogens

Area of Science:

• Microbiology
• Virology
• Infectious Diseases

Background:

• Healthcare-associated infections (HAIs) caused by ESKAPE pathogens pose a global health crisis due to extensive antibiotic resistance.
• The emergence of multi-, extensively, and pan-resistant bacteria necessitates the development of alternative therapeutic strategies.
• Bacteriophages (phages), viruses that infect bacteria, are being explored as a viable option for phage therapy.

Purpose of the Study:

• To describe methods for isolating and purifying bacteriophages targeting the ESKAPE pathogen Acinetobacter baumannii.
• To outline general techniques for phage research and characterization.
• To provide a foundation for developing phage therapy against resistant bacterial infections.

Main Methods:

• Isolation of bacteriophages from environmental samples (sewage, soil).
• Purification of phages to axenic stocks.
• Characterization techniques including host range analysis, burst size determination, DNA extraction, and restriction fragment length polymorphism (RFLP).
• Phage precipitation using polyethylene glycol (PEG).

Main Results:

• Successful isolation and purification of bacteriophages against Acinetobacter baumannii.
• Detailed protocols for various phage research methodologies are presented.
• Demonstration of techniques applicable to characterizing novel phage genomes.

Conclusions:

• Bacteriophage isolation and characterization are crucial steps in developing phage therapy.
• The described methods provide a framework for researching phages against challenging bacterial pathogens.
• Phage therapy holds significant potential as an alternative treatment for antibiotic-resistant infections.