THE MEANING OF DISEASE 85 



germs ; straight pasterns are bad for the feet ; poor 

 conformation is not consistent with efficiency or 

 easy functional activity. 



These examples clearly show that form and type 

 and physical characteristics have roles to play in 

 animal economy and in health to which the wise 

 stockman will give heed. 



Germs and Parasites. In addition to the above 

 causes of disease, another class is before us ready 



BACTERIA AS SEEN UNDER THE MICROSCOPE 



a, Spirillum, b, Micrococcus. c, Micrococcus. d, _Strep- 

 tococcus. e, f, g, h, Rod-shaped bacteria, i and /, Divisions. 



to inflict its injury at all times. Indeed, it is 

 a class of the greatest importance. I refer now 

 to parasites, bacteria, and germs, which cause more 

 loss to live stock than all others combined. Think 

 of hog cholera, a germ disease ; of tuberculosis, a 

 germ disease ; of stomach worms, parasites ; of stag- 

 gers, a mold disease ; of abortion, a germ disease ; 

 and hundreds of like nature, all due to parasites 

 and germs, disease agents that disturb and destroy 



