Tuberculosis Of The Intestine may occur in children as a primary infection; in adults it is frequently secondary to pulmonary and laryngeal tuberculosis. In children the source of infection is probably tuberculous milk. The consensus of opinion at present is that the tubercle bacillus found in the milk of diseased cows can infect the human organism, but does not frequently do so. The infection in adults is generally due to the swallowing of sputum.