CTICasesLegionella Micdadei Infection
Imaging findings
CT chest in a liver transplant patient shows progressive, clustered pulmonary nodules and areas of consolidation in the left lower lobe, associated with pleural effusion and significant inflammatory thickening of the larynx and trachea. FNAC and PCR confirmed Legionella micdadei.
Key takeaways
Legionella micdadei (also known as Pittsburgh pneumonia agent) is a fastidious, opportunistic pathogen that can cause severe, disseminated infection in immunocompromised hosts. In contrast to standard Legionella pneumophila, it can present as nodular or mass-like consolidation mimicking fungal disease, and can involve the upper airways.
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