162 SUPPURATION AND ALLIED CONDITIONS. 



inflammations of several serous surfaces, and other similar 

 conditions can be explained only in the same way. In 

 some cases of multiple suppurations due to staphylococcus 

 infection, which we have had the opportunity to examine, 

 only an apparently unimportant surface lesion was present ; 

 whilst in others no lesion could be found to explain the 





FIG. 46. Secondary infection of a glomerulus of kidney by the 

 staphylococcus aureus, 1 in a case of ulcerative endocarditis. The cocci 

 (stained darkly) are seen plugging the capillaries and also lying free. The 

 glomerulus is much swollen, infiltrated by leucocytes, and partly necrosed. 



Paraffin section ; stained by Gram's method and Bismarck-brown, x 300. 



origin of the infection. The organs or parts of the body 

 affected vary much in different cases, the distribution being 

 explicable only by selective action on the part of the organ- 

 isms. In some cases the lungs are especially affected, in 



1 This organism was obtained in pure culture from the kidney. 



