OF THE ALIMENTARY TRACT 189 



unless it is more clearly shown that such is not the 

 case. 



As to the infestation of the biliary tract and gall- 

 bladder there is further suspicion, and need of further 

 investigation. The presence of the organism in the 

 bile and duodenal material from a trans-duodenal 

 biliary drainage does not prove that it came from the 

 biliary system. However, it has been observed, ac- 

 cording to report, within the gallbladder, removed by 

 operation, on several different occasions, and it is 

 believed by some that it is related to a state of 

 chronic biliary tract inflammation with jaundice, 

 this state associated with later life and a sluggish or 

 costive bowel. 



In the writer's experience it occurs in the young 

 and the old, 27% of the Giardia hosts, all being chil- 

 dren, having diarrhoea, as compared to 8% of the fla- 

 gellate-free, 6% of the carriers of Trichomonas hom- 

 inis and 7% of carriers of Chilomastix mesnili, while 

 40%, these all being adults, were constipated. 



TREATMENT 



In a general way the prevention of this infection 

 should follow the same rules as for Eiidamoeba histo- 

 lytica or Chilomastix mesnili. Although, no doubt, 

 commonly transferred in the encysted stage by ex- 

 posure of unsterilized human excreta to drinking 

 water atid to flies, and the use of it in garden stuff 

 fertilization, in modern community life and in in- 



