Clinical Features, Radiological Findings and Treatment Outcome in Patients with Pulmonary Nocardiosis – A Retrospective Analysis
Abstract Introduction - Lack of specific clinical features makes the diagnosis difficult in Pulmonary Nocardiosis. High index of suspicion is required for diagnosis especially in cohort pre-existing risk factors. This study aimed at describing the clinical and radiological characteristics and outcome in patients with Pulmonary Nocardiosis.Methods - This was a retrospective observational study. Data of confirmed cases with Pulmonary Nocardiosis were collected from digital patient management system. Results - Total eight cases of Pulmonary Nocardiosis were included. The mean age of patients was 50 ± 14.3 years with female preponderance (62.5%). The most common co-morbidity was chronic lung disease (37.5%). The common clinical feature of pulmonary nocardiosis was cough with expectoration (50%). The mean duration of symptoms was 18 days. The common radiological (CT thorax) finding were consolidation, bronchiectasis, mediastinal lymphdenoathy and nodularity (50% each). One patient had extension of pulmonary disease in chest wall. Microbiological detection of Nocardia spp. was done in sputum samples (50%) and in BAL samples (50%). Culture was positive in two BAL samples. Intravenous empirical antibiotics in combination with oral trimethoprim sulfamethoxazole double standard (15 mg/kg trimethoprim) was started at the time of diagnosis. Ceftriaxone and amikacin were commonly used antimicrobials.Conclusion - Nocardia spp. commonly causes disease in patients with pre-exisitng lung pathological with or without defective cell mediated immunity. A high index of suspesion is required in patients with subacute to chronic respiratory symptoms, raised inflammatory markers and absence of common respiratory pathogens in evaluation.