Pulmonary nocardiosis n Pulmonary nocardiosis is the most common clinical presentation because inhalation is the primary route of nocardia exposure. n No special symptoms and chest radiograph variable, difficult clinically and radiographically to differentiate Nocardia from filamentous fungal (eg, aspergillosis, mucormycosis) or mycobacterial diseasePulmonary nocardiosis p Pulmonary nocardiosis is the most common clinical presentation because inhalation is the primary route of nocardia exposure. p No special symptoms and chest radiograph variable, difficult clinically and radiographically to differentiate Nocardia from filamentous fungal (eg, aspergillosis, mucormycosis) or mycobacterial disease