Abstract
Summary
It was observed that hemoglobin solutions (laked human erythrocytes in distilled water) when mixed with tissue extract antigen (Kahn antigen suspension) under proper conditions show immediate precipitation. This phenomenon of precipitation is manifested in a relatively wide range of hemoglobin-distilled water dilutions and also in various ratios of these dilutions to antigen suspension, Hemoglobin solutions derived from malarial blood specimens show a tendency toward a wider range of precipitation than hemoglobin solutions derived from non-malarial blood specimens. Ageing of the blood specimens at a temperature above refrigeration, such as room temperature, is an important factor in increasing the tendency toward such precipitation.
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