Abstract
Hepatitis B surface antigen (HBs antigen) was examined for elicitation of IgE production by injection into mice. The Prausnitz-Küstner (PK)-type skin test in the rat was employed for detection of IgE antibody to HBs antigen, because no sufficient purified HBs antigen was available as the challenging antigen for the passive cutaneous anaphylaxis (PCA) test in rats. The positive PK test was considered to be due to IgE antibody, since the active principle was inactivated by heating the sera at 56 C for 30 min, did not bind to protein A and was eliminated by anti-mouse IgE antisera. These data indicate that the PK-type test in rats can be used for detection of mouse IgE antibody when the amount of a test sample is not sufficient for the PCA test in rats.
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