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 

 undrained, 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 



Kg. 191.— Distortion of Hoop in as Advanced Form of Foot-hoi (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. 



