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Histoplasma capsulatum endocarditis
Insights
Endocarditis caused by Histoplasma capsulatum is rare. This case highlights successful treatment with amphotericin B and aortic valve replacement for a patient with severe heart failure.
Area of Science:
- Infectious Diseases
- Cardiology
- Mycology
Background:
- Endocarditis is inflammation of the heart's inner lining, often affecting valves.
- Disseminated Histoplasma capsulatum infection can rarely present with endocarditis.
- Fungal endocarditis poses diagnostic and therapeutic challenges.
Observation:
- A 22-year-old male presented with prolonged fever, weight loss, and worsening aortic insufficiency.
- Diagnostic clues included rising complement fixation titers for Histoplasma capsulatum and echocardiographic abnormalities.
- Bone marrow culture confirmed disseminated Histoplasma capsulatum infection pre-operatively.
Findings:
- Histoplasma capsulatum was identified on the explanted aortic valve during replacement surgery.
- The patient received a combination of amphotericin B and surgical intervention.
- Successful treatment led to resolution of symptoms and cure.
Implications:
- This case underscores the importance of considering fungal infections in endocarditis, especially in endemic areas.
- Aggressive management combining antifungal therapy and valve replacement can be curative for Histoplasma endocarditis.
- Early diagnosis and multidisciplinary care are crucial for managing rare manifestations of Histoplasma capsulatum.
Abstract:
Endocarditis is a rare manifestation of disseminated Histoplasma capsulatum infection. A 22-year-old man presented with a seven month history of fever, weight loss, and progressive aortic insufficiency. The diagnosis of H. capsulatum was suggested by a diagnostic rise in complement fixation titers and positive echocardiographic findings. The diagnosis was confirmed prior to surgery by positive bone marrow culture. Progressive congestive heart failure necessitated replacement of the aortic valve which subsequently grew H. capsulatum. In this case, a combination of amphotericin B therapy and valve replacement was curative.