Related Experiment Videos
Bacteriophage 604: a marker phage for multi-resistant Staphylococcus aureus in Australia
B Inglis1, I Heding, M Merrylees
1Department of Biochemistry, Faculty of Science, Australian National University.
Abstract:
Of 28 multi-resistant isolates of Staphylococcus aureus collected during 1986 from hospitals in major cities around Australia, 27 were found to contain the same prophage (denoted phage 604). Hospital isolates carrying three or fewer resistance markers, and community isolates carrying one or no resistance markers, did not carry this prophage. Phage 604 does not confer antibiotic resistance on its lysogens, nor does it increase virulence in chick embryo assays. Phage 604 appears to be a correlate of antibiotic multi-resistance in S. aureus in Australia, and may provide a molecular marker for incipiently epidemic strains of this bacterium in Australian hospitals.
Insights
A specific phage, phage 604, was found in most multi-resistant Staphylococcus aureus strains from Australian hospitals in 1986. This phage may serve as a marker for tracking antibiotic-resistant bacteria in hospitals.
Area of Science:
- Microbiology
- Bacteriology
- Virology
Background:
- Staphylococcus aureus is a significant cause of hospital-acquired infections.
- The emergence of multi-drug resistant strains poses a global health threat.
- Understanding the genetic factors associated with antibiotic resistance is crucial for effective control.
Purpose of the Study:
- To investigate the presence of specific prophages in multi-resistant Staphylococcus aureus isolates from Australian hospitals.
- To determine if any identified prophage is associated with antibiotic resistance or virulence.
Main Methods:
- Collection and characterization of 28 multi-resistant Staphylococcus aureus isolates from Australian hospitals in 1986.
- Prophage screening of isolates using molecular methods.
- Assessment of phage 604's effect on antibiotic resistance and virulence in laboratory assays.
Main Results:
- 27 out of 28 multi-resistant Staphylococcus aureus isolates contained the same prophage, designated phage 604.
- Phage 604 was not found in hospital isolates with limited resistance markers or community isolates.
- Phage 604 did not confer antibiotic resistance or enhance virulence in experimental models.
Conclusions:
- Phage 604 is strongly correlated with multi-antibiotic resistance in Staphylococcus aureus strains from Australian hospitals.
- Phage 604 may serve as a valuable molecular marker for identifying and tracking emerging epidemic strains of Staphylococcus aureus in healthcare settings.