both patients and children were tested with an intradermal dose of 5 tu , and the children were retested with 100 tu if the reactions were less than 5 mm.the results confirm those of earlier papers , that at least two different kinds of naturally acquired tuberculin sensitivity are found in many human populations : a high-grade sensitivity , designated as specific for virulent tuberculous infection , and a low-grade kind designated as non-specific , or not specific for tuberculous infection .
C0034131
tuberculin
C0041296
tuberculous