D/SEASES OF THE FOOT. 391 



sores, and tends to produce fungous growths of the skin around 

 the margin of the hoof, and a degeneration of horn in some 

 respects comparable to canker. It is mainly to be recognised 

 by its spread in a flock as a sequence of contact with diseased 

 animals, and without any sufficient cause in their management 

 or in the dampness of the locality. 



Treatment dot^ not differ materially from that of simple foot- 

 rot except that a preference must be given to antiseptics in the 

 selection of caustic dressings. Hydrochloric acid reduced with 

 thrice its bulk of water; chloride of zinc i dr., water i pint ; 

 carbolic acid ; butter of antimony, may be cited as examples. 

 Much more important, however, is it to separate the sound 

 from the diseased, and from contaminated pastures and build- 

 ings, and to thoroughly cleanse and disinfect the latter before 

 they are again used for the shelter of flocks (see Disinfection). 



FOOT-ROT FROM TUBERCULOSIS. 



This is common in cattle and sheep, the disease commencing 

 in the digital bones, which are enlarged with interstitial and 

 surrounding deposit, leading to open sores, open joints, and 

 complete destruction of the member (see Tuberculosis). 



