62 



POULTRY DISEASES AND THEIR TREATMENT. 



Still another very important piece of post-mortem evidence 

 is found if the intestines and the mesenteries are dotted with 

 these rounded nodules as shown in fig. 5. 



Fig. 5. Intestine and mesenteries of a fowl affected with 

 tuberculosis. (After Ward). 



The lungs are very rarely affected and then usually by the 

 infection spreading from the liver on to the adjoining lung tis- 

 sue. All this agrees with the fact previously stated that fowls 

 are most easil}^ infected through the digestive tract. Alteration 

 of the bones, joints or other organs occur much more rarely and 

 usually only in the most advanced stages of the disease. 



