Fungal endocarditis: an autopsy study
Sundaram Challa1, Aruna Kumari Prayaga, Laxmi Vemu
1Nizam's Institute of Medical Sciences, Hyderabad, Andhra Pradesh, India. challa_sundaram@yahoo.com
Abstract:
Between 1990 and 2002, 237 hearts were examined at autopsy, including 16 with infective endocarditis; 6 showed fungal endocarditis. The preceding pathology was chronic rheumatic heart disease in 2 patients, one of whom had undergone double valve replacement, 2 patients had been treated for acute lymphoblastic leukemia, and one had protein-energy malnutrition. The underlying cause was unknown in one case. The organisms isolated were Aspergillus in 3 patients, Zygomycota in 1, Candida in 1, and both Candida tropicalis and Aspergillus in 1 patient. Immunosuppressed states are a cause of fungal endocarditis in India, although chronic rheumatic heart disease is the preceding pathology in the majority of patients.
Insights
Fungal endocarditis is a rare but serious condition. In India, immunosuppression and chronic rheumatic heart disease are key risk factors, with Aspergillus and Candida being common culprits.
Area of Science:
- Cardiology
- Infectious Diseases
- Pathology
Background:
- Infective endocarditis (IE) poses a significant clinical challenge.
- Fungal endocarditis (FE) is a rare subtype of IE, often associated with high mortality.
- Understanding the predisposing factors and causative organisms is crucial for diagnosis and treatment.
Observation:
- Autopsy data from 1990-2002 revealed 16 cases of IE, with 6 classified as FE.
- Common preceding conditions included chronic rheumatic heart disease (CRHD) and acute lymphoblastic leukemia (ALL).
- Other contributing factors were protein-energy malnutrition and unknown causes.
Findings:
- The study identified Aspergillus, Zygomycota, and Candida species as causative agents of FE.
- Aspergillus was the most frequently isolated organism.
- A significant association was noted between immunosuppressed states and FE in the Indian population.
Implications:
- Immunosuppression is a critical risk factor for FE in India.
- While CRHD is a common underlying pathology, other conditions like hematological malignancies and malnutrition also predispose to FE.
- Early recognition and targeted antifungal therapy are essential for improving outcomes in patients with FE.
