THE DYSENTERIES— CI LIAR 



47 



Lainhlia intestinalis. A, ventral view ; B, side view ; N, one of the two nuclei ; ax, axostyles ; 

 fl'^,fi'',Jl^,P, the four pairs of flagella ; s, sucker-like depressed area on the ventral surface: 

 jir, bodies of unknown function. (After Wenyon.) 



man. The cysts have been found in the fajces of the common house 

 fly, which probably acts as an insect porter (Bahr). 



TREATMENT. 



Free purgation and intestinal antiseptics. Enemata are not much 

 use for the small intestine. 



Methylene blue can be tried, i — 2 grains, with or without liquid 

 paraffin, ;} ounce, thrice daily. 



Beta-naphthol has been tried. 



(3) Trichomonas intcstinalis is the common intestinal flagellate in 

 man which lives in the large intestine and ca?cum. It is a large pear- 

 shaped bod}' with three free flagella and one attached to the undulating 

 membrane. Its movements are very rapid, but a sixth objective will 

 reveal its characters. It will survive outside the bodv for days. 



Some assert that it is harmless, being found usually where other 

 organisms have deranged the intestine. 

 Encysted forms have not been proved. 



(4) Tetramitis mcsn'ili has been blamed for intestinal irritation, 

 followed by diarrhoea. It somewhat resembles the trichomonas, but 

 the latter has an undulating membrane and no large cytostome like the 

 former. It dies in a few hours when passed in the f^ces, while tricho- 

 monas persists for days. It may not be pathogenic. 



