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Bacillus cereus endocarditis involving a prosthetic valve.
Southern Medical Journal
|April 1, 1982
Summary
Late-onset endocarditis caused by Bacillus cereus is rare, especially in patients with prosthetic heart valves. This case highlights successful combination antibiotic therapy and valve replacement for a Bacillus cereus prosthetic valve endocarditis.
Area of Science:
- Infectious Diseases
- Cardiology
- Microbiology
Background:
- Prosthetic valve endocarditis (PVE) is a serious complication following cardiac valve replacement surgery.
- Late-onset PVE, occurring more than one year after implantation, presents unique diagnostic and therapeutic challenges.
- Bacillus cereus is an uncommon pathogen in infective endocarditis, particularly in the context of prosthetic valves.
Observation:
- A 55-year-old male patient presented with late-onset endocarditis.
- The patient had a history of Carpentier-Edwards heterograft valve implantation.
- Infecting organism identified as Bacillus cereus.
Findings:
- Combination antibiotic therapy with gentamicin and clindamycin was guided by minimal bactericidal concentration testing.
- Surgical intervention involving valve replacement was necessitated by a significant paravalvular leak.
- The patient achieved clinical resolution with no recurrence after a six-week course of antibiotics.
Implications:
- This case underscores the importance of considering Bacillus cereus in late-onset PVE, even with prosthetic valves.
- Effective management may involve a combination of targeted antimicrobial therapy and surgical intervention.
- Successful treatment outcomes are achievable with appropriate therapeutic strategies.