Bovine Tuberculosis. 



155 



up again. When such animals, while they still appear to be perfectly 

 well, are bought in good faith and placed in a healthy herd they bring 

 the disease and not infreciuently transmit it to other animals. Vari- 

 ous manifestations of the disease are seen in Figs. 33-36. 



It is very likely that some animals, especially cattle, are infected 

 and recover. This is to be expected in some cases where they are 



Fig. 35. — A photograph of (he tubercular Kodulcs on the uuierdum {covering the 

 intestines) of an advanced case of generalized tuberculosis. 



kept under favorable hygienic conditions. At present, however, our 

 knowledge of recovery from tuberculosis in cattle is too meager to 

 warrant much encouragement froin this source. It appears to be 

 safer and more economical not to trust to a recovery. 



