PARASITOLOGY, 229 
colorless fluid which has a specific gravity of from 
1005 to 1015, and contains from 1.5 to 2 per cent 
solids, of which, .25 to .5 per cent is sugar, about one 
per cent chloride of sodium, cholesterin, succinic 
acid, creatin and traces of lipase and proteids. As 
the cyst wall contains glycogen it is probable that the 
sugar comes from this source. The walls also con- 
tain chitin. 
Eosinophilia——The chemic substance of the animal 
parasites produce a positive chemotaxis. This affects 
particularly the eosinophile leucocytes. There is a 
local accumulation of the eosins in the tissues nearest 
the parasite. In some instances there is an increase 
in the blood. These conditions have, particularly, 
been noted in parasitism due to species of the follow- 
ing genera: Taenia, Filaria, Uncinaria, Ascaris, 
Strongylus, Trichina and certain protozoa. The de- 
gree of eosinophilia depends upon the degree of in- 
festation. 
