122 A MANUAL OF BACTERIOLOGY 



excreting organ for microbes (Fig. 31); and microbes 

 incapable of growing in the blood, may cause serious 

 effects by growing in the excretory canals. This 

 may explain some cause of pyelitis. 



(6.) Micrococci are always present in acute 



FIG. 31. SECTION OF KIDNEY CONTAINING MICROCOCCI (after Watson Cheyne). 



To the left is a mass of micrococci ; to the right an inflammatory ring, 

 and intermediately the necrotic area, infiltrated with micrococci. What 

 are evidently remains of two kidney-tubules are seen full of micrococci 

 and leucocytes. 



X 375. 



abscesses, and are probably the cause of them. In 

 some cases, the micrococci are the primary cause of 

 the inflammation and suppuration, as in pyeernic 



