FOOT-ROT. 



467 



when introduced into the system by inoculation, and probably when 

 taken in by the mouth from contaminated pastures. 



2. That it cannot be produced by long-continued exposure to 

 imdrained, moist soils, with an abundant, coarse and wet herbage. 



3. That animals exposed to these conditions for many months, 

 .and resisting entirely the influences named above, contract foot-rot 



FIG. 191. DISTORTION OF HOOF IN AN ADVANCED FORM OF FOOT-ROT (BROWN). 



in from fourteen to twenty-one days on being placed among sheep 

 suffering from the disease. 



4. That sheep affected with foot -rot may improve, and from 

 time to time become worse ; and finally may recover and present a 

 perfectly healthy condition of foot, notwithstanding that they have 

 been kept the whole period under the conditions which induced the 

 disease. 



