PARASITIC DISEASES. 175 



ficient water. At night, given a teaspoonful 

 turpentine in several ounces raw linseed oil ; oleo- 

 resin of male fern may be substituted for the 

 turpentine. 



7. Esophagostoma Columbiamim. 



This minute parasite is the cause of the com- 

 mon "nodular disease " so often seen in packing 

 houses, where large numbers of sheep are slaugh- 

 tered. The nodules vary in size; the older and 

 larger ones being calcareous, while the smaller 

 ones contain the parasite embedded in a mucu- 

 purulent matter. 



The symptoms are so obscure that the presence 

 of the parasite is not discovered until after 

 slaughter. 



Treatment is hopeless. Prevention is the pro- 

 cedure for which to strive, and this is not thor- 

 oughly understood. The high dry ranges of the 

 extreme West seem infested, and each year more 

 western lambs are affected. 



8. Sarcosporidiosis. 



Sarcocystis tenella; Miescher's tubules. 



A class of minute parasites infecting the mus- 

 cular tissues of animals, also known as "Mies- 

 cher's tubules. " It is becoming a very common 

 parasite. 



Animals grazed in swampy pastures or near a 

 pond seem to be more commonly affected. Later 



