Abstract
Summary
1. Saline suspensions prepared from yolk sacs heavily infected with the virus of Lymphogranuloma venereum and inactivated with 2% urea or 0.5% phenol constituted satisfactory diagnostic skin test antigens in high dilutions.
2. Yolk sac suspensions treated with phenol so as to enhance their complement-fixing activity 16-fold were not appreciably more active as skin test antigens than urea-treated suspensions.
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