Hemagglutinins and hemolysins for erythrocytes sensitized with tuberculin in pulmonary tuberculosis

that sera from tuberculous animals and human be-ings are capable of agglutinating and lysing eryth-rocytes previously treated with extracts of tubercle bacilli has aroused considerable interest. In a brief period of time several clinical evaluations of the hemagglutination test have appeared in print (3, 4). As yet only one preliminary report has appeared concerning its hemolytic modification (4). It is the purpose of the present paper to re-port our clinical experience with both tests during the past year. More than 1000 tests have been car-ried out in that period with sera obtained from well over 100 patients having active tuberculosis and a similar number of adults not having active tuberculosis