A New Approach for Phage Cocktail Design in the Example of Anti-Mastitis Solution

Area of Science:

• Microbiology
• Veterinary Medicine
• Biotechnology

Background:

• Phage therapy offers a promising alternative for treating bacterial infections.
• Effective phage therapy relies on carefully composed bacteriophage cocktails.
• Mastitis, a common animal disease, is often caused by Escherichia coli and Staphylococcus aureus.

Purpose of the Study:

• To rationally design and develop an effective bacteriophage cocktail for treating mastitis.
• To evaluate the efficacy of the developed cocktail against Escherichia coli and Staphylococcus aureus.

Main Methods:

• Bioinformatic characterization of bacteriophages.
• In vitro evaluation of bacteriophage activity.
• Composition of a cocktail with five phages for E. coli and three for S. aureus.
• Testing in a milk model and biofilm prevention assays.

Main Results:

• The phage cocktail significantly reduced Staphylococcus aureus (45%) and Escherichia coli (30%) in a milk model.
• Demonstrated 99% inhibition of biofilm formation for S. aureus strains.
• Achieved at least 50% inhibition of biofilm formation for 50% of E. coli strains.

Conclusions:

• Rational design of bacteriophage cocktails is crucial for effective phage therapy.
• The developed cocktail shows potential for treating mastitis in animals.
• Further in vivo studies are required to confirm efficacy.