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Burkholderia pseudomallei-An Underrecognized Cause of Community-acquired Pneumonia: A Case Series from Central
Anuja George1, Rosmi Jose2, Chithra Valsan3
1Senior Resident, Department of Microbiology, Jubilee Mission Medical College and Research Institute, Thrissur, Kerala, India.
Abstract:
Melioidosis, caused by Burkholderia pseudomallei, is an emerging infectious disease endemic in several regions of the world, including India. It presents with a wide spectrum of clinical manifestations, among which pneumonia is the most common. Due to its clinical resemblance to bacterial pneumonia and pulmonary tuberculosis, coupled with limited access to advanced microbiological diagnostics, pulmonary melioidosis is frequently underdiagnosed. We report 3 culture-confirmed cases of pulmonary melioidosis from a tertiary care hospital in central Kerala. All patients were diabetic males, with additional comorbidities such as chronic obstructive pulmonary disease (COPD), chronic liver disease, anemia, smoking, and alcoholism. Notably, 2 had a prior history of pulmonary tuberculosis. Imaging revealed multifocal lung involvement, including consolidations, opacities, and cavitary lesions. Following microbiological confirmation, empirical therapy for community-acquired pneumonia (CAP) was modified to ceftazidime with or without cotrimoxazole. Despite intervention, 2 patients succumbed to the illness. This case series underscores the need for heightened clinical suspicion and robust microbiological support in diagnosing melioidosis. In high-risk patients presenting with multifocal pulmonary lesions, early modification of empirical antibiotic therapy may improve clinical outcomes and reduce mortality.
Insights
Melioidosis, an emerging infectious disease caused by Burkholderia pseudomallei, is often underdiagnosed due to its similarity to other lung infections. Early diagnosis and modified antibiotic therapy in high-risk patients are crucial for improving outcomes.
Area of Science:
- Infectious Diseases
- Microbiology
- Pulmonology
Background:
- Melioidosis, caused by Burkholderia pseudomallei, is an emerging infectious disease with diverse clinical presentations, frequently resembling bacterial pneumonia or tuberculosis.
- Pulmonary melioidosis is often underdiagnosed due to limited diagnostic facilities and clinical mimicry, particularly in endemic regions like India.
Purpose of the Study:
- To report culture-confirmed cases of pulmonary melioidosis from central Kerala.
- To highlight the diagnostic challenges and clinical characteristics of melioidosis in patients with comorbidities.
- To emphasize the importance of early diagnosis and appropriate antibiotic modification for improving patient outcomes.
Main Methods:
- Retrospective analysis of 3 culture-confirmed cases of pulmonary melioidosis.
- Review of clinical presentations, comorbidities, imaging findings, and treatment outcomes.
- Microbiological confirmation using culture techniques.
Main Results:
- All 3 patients were diabetic males with multiple comorbidities, including COPD, chronic liver disease, and a history of tuberculosis.
- Pulmonary melioidosis presented with multifocal lung involvement on imaging, including consolidations, opacities, and cavitary lesions.
- Despite empirical treatment modification to ceftazidime, 2 out of 3 patients died, indicating the severity of the disease.
Conclusions:
- Heightened clinical suspicion and robust microbiological support are essential for diagnosing melioidosis, especially in high-risk individuals.
- Early modification of empirical antibiotic therapy in patients with multifocal pulmonary lesions may improve outcomes and reduce mortality.
- Melioidosis remains a significant public health concern in endemic areas, necessitating improved diagnostic strategies and timely intervention.
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