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Gram-negative bacterial endocarditis in narcotic addicts
Abstract:
The number of cases of bacterial endocarditis in drug addicts seen at UCLA and Wadsworth Veterans Administration hospitals increased sharply in 1971 over the average of the four preceding years. Enteric Gram-negative bacilli were the infecting organism in three of the seven cases seen in 1971 but were not found in any cases of endocarditis in the 1967-70 period. Medical treatment of the patients was, in general, unsuccessful in spite of the intensive use of newer antimicrobials active against enteric Gram-negative bacilli. One patient died with fulminant Pseudomonas endocarditis and two others (Pseudomonas and Serratia endocarditis) eventually required operations on the heart before a cure was achieved.
Insights
Bacterial endocarditis cases in drug users rose in 1971, with Gram-negative bacilli becoming a notable cause. Treatment was often unsuccessful, highlighting challenges in managing this severe infection.
Area of Science:
- Infectious Diseases
- Cardiology
- Microbiology
Background:
- Bacterial endocarditis is a serious heart valve infection.
- Drug abuse is a known risk factor for endocarditis.
- A rise in specific bacterial infections was observed in a clinical setting.
Purpose of the Study:
- To report an increase in bacterial endocarditis cases among intravenous drug users.
- To identify the causative organisms, particularly Gram-negative bacilli.
- To evaluate the efficacy of medical treatments for this patient population.
Main Methods:
- Retrospective analysis of endocarditis cases at UCLA and Wadsworth Veterans Administration hospitals.
- Review of patient records from 1967-1971.
- Identification of infecting organisms and assessment of treatment outcomes.
Main Results:
- A sharp increase in bacterial endocarditis cases was observed in 1971 compared to prior years.
- Enteric Gram-negative bacilli were identified as the causative agent in 3 of 7 cases in 1971, a new finding.
- Medical treatments, including newer antimicrobials, were largely unsuccessful.
Conclusions:
- Intravenous drug use is associated with a rise in bacterial endocarditis.
- Enteric Gram-negative bacilli pose a significant challenge in treating endocarditis in this population.
- Effective management may require aggressive interventions, including surgical treatment, for severe cases.