2IO 



AVIAN TUBERCULOSIS 



row reactionary band consisting very largely of round cells. 

 The structure is constant in both small and large tubercles, 

 and not strikinglv different from the structure of tubercles in 



Fig. 49. A photograph of a tuberculous mesentery of a /otl'I. There 

 are a few small tubercles on the intestine. 



certain of the mammals. The larger nodules seem in some 

 instances to be the result of a continuous growth of a single 



