CTICasesLegionella micdadei Pneumonia (Second Case)
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Imaging findings
Chest CT in another renal transplant recipient shows a solitary, well-circumscribed, compact nodular area of consolidation in the lung, initially suspected to represent a fungal infection such as aspergillosis or cryptococcocis.
Key takeaways
Opportunistic round pneumonias in transplant patients have a broad differential including Aspergillus, Cryptococcus, Nocardia, and PTLD. However, the incidence of nocardiosis has decreased due to widespread trimethoprim-sulfamethoxazole (Bactrim) prophylaxis, making Legionella micdadei an important alternative pathogen to consider when a nodular infection progresses rapidly.
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