The demonstration of transmissible gastroenteritis viral antigens by immunoelectrophoresis and counterimmunoelectrophoresis.

Immunoelectrophoresis of alkaline intestinal extracts, or the supernatants after precipitation of these extracts with 60% ammonium sulfate, prepared from piglets experimentally infected with the DL or Purdue strains of transmissible gastroenteritis virus, revealed up to three antigens. Two antigens migrated towards the anode, and the third migrated towards the cathode. Antigens with anodal or cathodal mobility were also demonstrated in the same materials by counterimmunoelectrophoresis, and the procedure for counterimmunoelectrophoresis was modified to detect both antigens in a single test.