INFECTIONS OF THE DIGESTIVE TRACT 71 



are not active. This is shown by the character of the 

 urine and by the nature of the decomposition products 



negative cocci, ill-defined as regards staining, are seen. Epithe- 

 lial cells are numerous. The number of bacteria here is extremely 

 small. 



IV. Ileum. Bacteria are more numerous here, but the number 

 of varieties is small. There are a few forms resembling B. coli, 

 short, stout, negative bacilli; also bacilli of about the same 

 width and three to four or five times the length of typical coli; 

 also a medium-sized or rather large, positive diplococcus and a 

 few small, positive bacilli about the size of colon bacilli. The 

 long, slender, Gram-negative bacillus is rather prominent. Some- 

 times it takes the form of a fairly long thread. Considerable 

 epithelium is present in this section. 



V. Caecum. This field presents an entirely different picture 

 from the preceding. The bacteria are numerous. The field is 

 mixed about evenly as regards the staining. Negative bacteria 

 consist of three forms small diplococci which are moderately 

 numerous; short bacilli, suggesting colon bacilli in the typical 

 form; slender, negative bacilli, more slender than colon and two 

 or three times as long, sometimes in threads. The positive forms 

 consist of oval diplococci medium-sized, occasionally large, single, 

 oval cocco-bacilli, a few forms suggesting colon bacilli (but these 

 are not numerous) and a very few organisms the size and form of 

 B. aerogenes capsulatus, though tending to be a little small for this 

 organism ; and a few positive bacilli of this type containing spores 

 located between the middle and end. No free spores are observed. 

 The rather long, stout negative bacilli observed at higher levels 

 are also seen occasionally. There are a few slender, negative 

 bacilli showing irregularities in staining; that is, "punctate" 

 bacilli. 



VI. Sigmoid flexure. Bacteria are numerous. The negative 

 forms are more prominent than in the last level. Organisms of 

 the colon type are numerous, as are also slender, negative bacteria. 

 Positive diplococci are considerably less numerous than in higher 

 levels. There are moderate numbers of organisms suggesting 

 capsulatus, but their number is, however, very small in comparison 

 with the total number of bacteria. Spore-holders are not seen, 

 nor are free spores. 



VII. Rectum. The fields are mixed. Colon bacilli are numerous, 



