Abstract
The agar double-diffusion precipitation test was investigated to detect hog cholera virus in splenic and pancreatic tissues of swine. Special attention was given to the conditions influencing the sensitivity and specificity of the test. These studies emphasize the strict techniques and methods required in the test in order to detect specific antigen — antibody reaction. Absorption studies performed on serum fractions prepared by DEAE cellulose chromatography and studied electrophoretically, indicated the specific reaction was given by fractions, migrating in the gamma-globulin region and was absorbed by infected but not by normal spleens. The sensitivity of the test is dependent to a great extent on the successful liberation of the viral antigen from the tissue.
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