XL] 



BACILLUS: PATHOGENIC FORMS. 



177 



after death they are present in small numbers, in the upper 

 part of the ileum and in the jejunum they are either very 

 scarce or altogether absent. The longer the examination is 

 delayed, of course within certain limits, the more likely are 

 the comma-bacilli to be found numerously in the flakes, but 



FIG. 99. 



Part of a test-tube containing gelatine-peptone ; in it pure cultivation of choleraic 

 comma-bacilli. The funnel-shaped opening of the channel in which the growth 

 of the comma-bacilli is going on contains a long air bubble. 



not to the exclusion of other bacteria. They are generally 

 absent from the mucous membrane itself, inclusive of the 

 epithelium of the surface loosened but not detached. No 

 organisms of any kind are found in the tissue of the intestine, 

 in the blood, and other tissues; putrefactive bacteria, 



N 



