Mixed Pneumonias 513 



MIXED PNEUMONIAS. 



It frequently happens that pneumonia occurs in the course 

 of influenza or shortly after convalescence from it. In these 

 cases a mixed infection by the influenza bacilli and pneu- 

 mococci is commonly found. Sometimes pneumococci and 

 staphylococci simultaneously affect the lung, purulent pneu- 

 monia with abscess formation being the conspicuous feature. 

 Almost any combination of the described bacteria may occur 

 in the lungs, producing varying inflammatory conditions, 

 so that it must be left for the student to work out what the 

 particular characteristics of each may be. 



Among the mixed forms of pneumonia may be mentioned 

 those called by Klemperer and Levy " complicating pneu- 

 monias," occurring in the course of typhoid fever, etc. 



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