178 PROTOZOAN PARASITISM 



of rules of personal hygiene and, probably, the con- 

 trol of food handlers which harbor the parasite, seem, 

 therefore, to be of particular importance in any ex- 

 pectancy of prevention of its spread. Proper sewage 

 disposal and fly control are already well observed 

 where it is prevalent, but no doubt are responsible 

 factors in the spread of the parasite and for higher 

 incidence in regions where these practices are not in 

 force. Control of the spread of this parasite seems 

 to be quite similar to that of Endamoeba histolytica. 



Curative. There is nothing in the nature of a 

 specific curative method of treatment or drug to be 

 presented in this case. 



The several remedies which are used against the 

 intestinal trichomonad are used against Chilomastix. 

 Among these the arsenicals have been used. In the 

 test tube, however, neoarsphenamine in as strong 

 solution as 0.45 gm. per 100 cc. of 0.9% sodium chlo- 

 ride solution did not kill this organism within an hour. 



It should not be difficult to determine the effect 

 to those arsenicals used in the treatment of syphilis, 

 since a certain per cent, of the patients of any syph- 

 ilis clinic harbor the parasite, and it is not difficult to 

 determine its presence and continuance. 



GIARDIA INTESTINALIS. (GIARDIA LAMBLIA. 

 GIARDIA ENTERICA.) 



Giardia intestinalis, formerly called Lamhlia in- 

 testinalis, is the representative in man of a genus 

 of protozoa having a number of species in animal 



