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Streptococcus mitis endocarditis. Report of 17 cases
Abstract:
Seventeen patients with Streptococcus mitis endocarditis were treated at a municipal hospital over a three-year period. Thirteen patients were intravenous drug addicts. Streptococcus mitis has a predilection for right-sided endocarditis in intravenous drug addicts and left-sided endocarditis in non-drug addicts. Streptococcus mitis is highly susceptible to therapy with penicillin G potassium (minimal inhibitory concentration less than or equal to 0.1 mg/L of penicillin in all of these 17 cases), and four to six weeks of therapy is safe and effective.
Insights
This study shows that Streptococcus mitis endocarditis is effectively treated with penicillin G potassium. The antibiotic is safe and effective for both intravenous drug users and non-drug users.
Area of Science:
- Infectious Diseases
- Cardiology
- Microbiology
Background:
- Streptococcus mitis is a common cause of infective endocarditis.
- Intravenous drug use is a significant risk factor for infective endocarditis.
Purpose of the Study:
- To evaluate the treatment outcomes of Streptococcus mitis endocarditis.
- To determine the efficacy and safety of penicillin G potassium therapy.
Main Methods:
- Retrospective analysis of 17 patients with Streptococcus mitis endocarditis.
- Review of patient demographics, clinical presentation, and treatment regimens.
- Assessment of microbiological data and antibiotic susceptibility.
Main Results:
- Thirteen of 17 patients were intravenous drug addicts.
- Streptococcus mitis showed a predilection for right-sided endocarditis in drug addicts and left-sided in non-drug addicts.
- All isolates were highly susceptible to penicillin G potassium (MIC ≤ 0.1 mg/L).
Conclusions:
- Penicillin G potassium is a safe and effective treatment for Streptococcus mitis endocarditis.
- Four to six weeks of penicillin G potassium therapy is recommended.
- Understanding the predilection for right-sided vs. left-sided endocarditis in different patient populations is crucial.