Abstract

1. 1. Sera from specifically immunized rabbits were employed in agar-gel diffusion precipitin test techniques in the qualitative antigenic analyses of fish extracts and fish-derivative preparations. 2. 2. Fish antigens were demonstrated in some samples of cod- and halibutliver oils, with wide variations in components existing among different lots of these materials. 3. 3. Antigenic fish constituents could not be detected in the emanations of raw, fried, or boiled cod and halibut. 4. 4. Fish antigens were identified in protamine and sodium morrhuate. 5. 5. The antigenic components of fish roe did not demonstrate cross-antigenicity with egg proteins of chicken origin. 6. 6. A wide qualitative variation among individual component antigens of fish muscle was demonstrated in homologous species skin-testing extracts of different laboratory sources.

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