Automated Technique for the Detection of Hemagglutinins to Sheep Erythrocytes

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Abstract
The Technicon autoanalyzer system used for the detection of homologous human hemagglutinins has been modified for the detection of hemagglutinins to sheep red blood cells. Antibody quantitation was obtained by plotting the optical density (OD) readings of peak heights of a serially diluted reference serum versus the serum dilutions. When the OD of the peak height of an unknown sample fell within the linear portion of the plot, a direct determination of the antibody titer was made. If the OD of the sample fell outside the linear portion, dilutions of the sample were carried out until a direct reading could be made. Assay by this method of at least 140 samples was possible within a day. Titers obtained with the autoanalyzer agreed very closely with those obtained by manual titration.

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