x] BACILLI : SPECIAL 189 



pears to be the norma! large intestine ; in acute and chronic 

 diseases of the small intestine it may be very copiously 

 present in the ileum. 



Bacillus coli is a motile, aerobic (facultative anaerobic), 

 non-sporing, non-liquefying rod ; it is killed by thorough 

 drying and by a temperature of 66° C. in five minutes. 



Fig. 60. — Surface Growth on Gelatine of Bacillus Coli, showing 

 Isolated, Confluent Colonies. 



The length of the individuals varies between o'8 /u, and 

 I '5 /x-3 jj., though in later stages in culture longer or shorter 

 filaments are met with ; its thickness is about o'4-o'5 /i. 

 When examined fresh from the intestinal contents in health 

 and disease only a minority are as a rule found to be pos- 

 sessed of motility, though in some cases (English cholera) 



