Pathologic [■eatures of Legionnaires' Disease 





Z77!? 







Figure 1. Intia-alveolar exudate filling alveolar space. Note 

 necrosis of inflammatory cells (hematoxylin-eosin. original 

 magnification X 100). 



Figure 2. Detail of inflammatory e.xudate. Note mixture of 

 polymorphonuclear leukocytes, macrophages, and fibrin 

 (hematoxylin-eosin, original magnification X 200). 



Figure 3. Legionnaires" disease bacteria in area of consolida- 

 tion. (Dieterle silver impregnation, original magnification 

 X 200). 



Figure 4. Legronnaires' disease bacteria. Note that they 

 appear as short, blunt rods (Dieterle silver impregnation, 

 original magnification X 500). 



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