PURULENT OR SUPPURATIVE INFLAMMATION. 257 



area. In other words, an abscess is simply a liquefied in- 

 flammatory focus containing a large number of migrated 



FIG. 98. 



Pus from virulent abscess-formation (Grawitz). The leukocytes show marked ne- 

 crotic changes, chromolysis. c, c, well-preserved leukocytes; EK, connective- 

 tissue cells from the neighboring granulations ; z, similar cells necrosed. 



leukocytes. In the greater number of cases the liquefaction 

 of the tissues is a sort of peptonization brought about by fer- 



FIG. 98J. 



Typhoid ulcer of intestine, second week. A, mucosa and submucosa \B, muscularis ; 

 C, serous coat ; a, villi ; b, slough, on both sides the broad infiltrated border. 

 X 12 (Schmaus). 



ments the product of bacterial growth. The organisms most 

 frequently concerned in purulent inflammations are the pyo- 

 genic staphylococci and streptococci, though the bacillus 



17 Hist. 



