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Treatment of bacterial endocarditis with vancomycin
Abstract:
Five patients with bacterial endocarditis who were allergic to penicillin were treated successfully with vancomycin. The causative microorganisms were Streptococcus bovis, S faecalis, S agalactiae, S intermedius, and Staphylococcus aureus. Except for the strain of S faecalis, vancomycin was bactericidal against these organisms at easily achievable serum concentrations. To insure a bactericidal serum titer of 1:8 or greater, streptomycin was added in the therapy of the case caused by S faecalis. There was no toxicity from vancomycin therapy in our patients except for mild phlebitis at the infusion site. Vancomycin appears to be an effective alternative to penicillin in individuals with endocarditis due to susceptible organisms. Vancomycin in combination with an aminoglycoside may be appropriate therapy for enterococcal endocarditis.
Insights
Vancomycin effectively treated bacterial endocarditis in penicillin-allergic patients. This antibiotic demonstrated bactericidal activity against common causative bacteria, offering a safe alternative therapy.
Area of Science:
- Infectious Diseases
- Pharmacology
- Cardiology
Background:
- Bacterial endocarditis poses significant treatment challenges, particularly in patients with allergies to standard therapies like penicillin.
- Identifying effective and safe alternative antibiotics is crucial for managing this serious infection.
Observation:
- This study evaluated vancomycin treatment in five patients with bacterial endocarditis who had penicillin allergies.
- The causative bacteria included Streptococcus species and Staphylococcus aureus.
Findings:
- Vancomycin achieved successful treatment outcomes in all five patients.
- It exhibited bactericidal activity against most tested organisms at achievable serum concentrations.
- Streptococcus faecalis required combination therapy with streptomycin to ensure bactericidal levels.
Implications:
- Vancomycin is a viable and effective alternative to penicillin for bacterial endocarditis caused by susceptible microorganisms.
- Combination therapy with vancomycin and an aminoglycoside may be beneficial for enterococcal endocarditis.
- Vancomycin demonstrated a favorable safety profile, with only mild phlebitis observed.