200 



BOVINE PATHOLOGY. 



a 5 * 



^^oU dd. 



V^VERUCRUKCUta, 



Fig. 27. — Infusoria from the alimentary canal of the horse, similar to those 

 which have been found in the contents of the rumen of the ox. (From 

 Culin, * Physiologic des animaux domestiques.') 



from a portion of dead material of similar size and form. The 

 living state seems to produce an absence or imperfection 

 of the tendency which is observable in the system of the 

 ox to throw off anything which does not belong to it, as 

 foreign matter. Since the ill effects of parasites are so 

 often proportional to the number of worms present, we 

 find that when the climatic conditions of any season have 

 been especially favorable to their growth and develop- 

 ment epizootic outbreaks of parasitic disorders are noted. 



