Tuberculosis is to some extent prevalent here and there among the poultry flocks of Iowa. That has been brought out In the examination of birds, or their tissues, brought or sent for diagnosis to the veterinary laboratories of the Iowa State College and from field work by the veterlnary and poultry staff of the agricultural extension department. From November 1, 1909, to June 30, 1912, the pathology laboratory examined the tissues of seventy-three birds, two of which, or 2.7% were found to be affected with tuberculosis. From July 1, 1912, to September 11, 1915, two hundred fifty-five fowls were examined and It was found that In forty-three, or 16.86%, tuberculosis was the cause of sickness or death. From September 11, 1915, to June 1, 1918, there were examined In the laboratory of the Department of Veterinary Investigation two hundred and twenty-seven fowls. Eighty-three or 36.57% were found to be affected with tuberculosis. These birds or tissues came from many different flocks In various parts of the state.