TY - JOUR T1 - AN unusual case of intra-group agglutination AU - Levine P, Stetson RE Y1 - 1939/07/08 N1 - 10.1001/jama.1939.72800270002007a JO - Journal of the American Medical Association SP - 126 EP - 127 VL - 113 IS - 2 N2 - This report deals with a rare property in the blood of a patient whose serum showed an iso-agglutinin of moderate activity, which agglutinated about 80 per cent of the bloods of her own group. In view of the fact that this agglutinin tended to disappear after an interval of several months and the fact that this agglutinin gave an equally strong reaction at 37 and 20 C., it would seem to resemble agglutinins resulting from iso-immunization following repeated transfusions. This phenomenon is readily reproduced in some species (cattle, chickens, rabbits), by several repeated transfusions, but in the case of man only two clearcut instances of such iso-immunization to cellular elements are described in the literature.1 The case to be described differs from these in that the immune iso-agglutinin must have been stimulated by a factor other than repeated transfusion. The nature of this factor becomes evident from a summary SN - 0002-9955 M3 - doi: 10.1001/jama.1939.72800270002007a UR - http://dx.doi.org/10.1001/jama.1939.72800270002007a ER -