THE DIGESTIVE SYSTEM. 



557 



Bacillus pyocyaneus has been repeatedly found in the discharges in 

 cases of dysentery as well as in other intestinal disorders under conditions 

 which justify the conjecture that it is sometimes at least an excitant of 



FIG. 332. NODULAR COLITIS FOLLICI'LAR COLITIS. 

 Showing commencing necrosis of the mucosa over the hyperplastic lymph-nodule. 



intestinal inflammation and necrosis. ' Streptococcus pyogenes has been 

 repeatedly found in association with colitis. 



Nodular Colitis (Follicular Colitis). In many cases of catarrhal and 

 croupous inflammation of the colon the solitary follicles (lymph -nodules) 

 become more or less swollen arid necrotic. Besides these cases, however, 

 there are others in which the changes in the nodules form the principal 



FIG. 333. NODULAR COLITIS WITH ULCERATION. 

 Showing necrosis and ulceration of the lymph-nodule with opening into the lumen of the gut. 



part of the lesion, while the catarrhal or croupous inflammation is but 

 slightly developed. The lesion is similar to that in nodular enteritis. 

 The nodules are first swollen hyperplastic (Fig. 332), then necrotic, 

 then slough away and leave little circular ulcers with overhanging edges 



micro-organisms see Flexner, Phila. Med. Jour., vol. vi., p. 414, 1900; see also Lentz, 

 Kolle and Wassermann "Handbuch der Mikroorganismen," Bd. i., p. 309. 

 1 See Lartigau, Jour. Exp. Med., vol. iii., p. 595, 1898. 



