OF THE ALIMENTARY TRACT 93 



harmless themselves and that the course of treatment 

 must be watched. 



Finally, for re-emphasizing, the nature of the or- 

 ganism, its two phases, its habitat, in the lumen, in 

 ulcers, in tissues, the local destruction of tissue and 

 the necessity for producing healing, the possible ex- 

 tra-intestinal involvement, all must be considered in 

 any rational medical attack upon the obviously dis- 

 eased host or the apparently healthy carrier. Time 

 and care are no small parts of the treatment. 



