New bacteriophages of Staphylococcus epidermidis

Area of Science:

• Microbiology
• Bacteriology
• Virology

Background:

• Staphylococcus epidermidis is a significant opportunistic pathogen.
• Effective typing methods are crucial for understanding S. epidermidis epidemiology.
• Bacteriophages offer a potential tool for bacterial identification and characterization.

Purpose of the Study:

• To assess the activity spectrum of 90 bacteriophages against Staphylococcus epidermidis and Staphylococcus aureus.
• To develop and evaluate a phage typing scheme for S. epidermidis.

Main Methods:

• Ninety bacteriophages (U-series and Ph-series) were tested against 183 strains of S. epidermidis and 258 strains of S. aureus.
• Phage sensitivity and lysis patterns were analyzed.
• Sixteen phages were selected for developing an S. epidermidis phage typing system using routine test dilutions.

Main Results:

• All 90 phages demonstrated activity against both S. epidermidis and S. aureus, with noted differences in sensitivity.
• The developed phage typing scheme for S. epidermidis identified 42 distinct phage patterns.
• 71.6% of the tested S. epidermidis strains were sensitive to the selected phages.

Conclusions:

• Phage typing of S. epidermidis is a viable method for epidemiological surveillance.
• The characterized bacteriophages can be utilized for ecological studies of S. epidermidis.
• This phage typing system provides a valuable tool for differentiating S. epidermidis strains.