Case of Staphylococcus aureus with Reduced Vancomycin Susceptibility
Author Information
Author(s): Sharon S. Rotun, Virginia McMath, Dianna J. Schoonmaker, Peggy S. Maupin, Fred C. Tenover, Bertha C. Hill, David M. Ackman
Primary Institution: United Hospital Medical Center
Hypothesis
The GISA isolate emerged from a methicillin-resistant S. aureus (MRSA) strain in a patient.
Conclusion
The study reports a case of a patient with a fatal infection caused by a Staphylococcus aureus strain that has reduced susceptibility to vancomycin.
Supporting Evidence
- The GISA isolate had a vancomycin MIC of 8 g/ml.
- The patient had a history of MRSA infection and received prolonged vancomycin treatment.
- Comparison of isolates suggested the GISA emerged from the MRSA strain.
Takeaway
A patient got very sick from a type of bacteria that didn't respond well to a common antibiotic. This shows how some bacteria can change and become harder to treat.
Methodology
The study involved isolating and testing the bacteria from a patient, comparing it with previous isolates, and conducting susceptibility tests.
Limitations
An autopsy was not performed, limiting understanding of the exact cause of death.
Participant Demographics
The patient was a 79-year-old man with multiple health issues.
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