Abstract
Conclusions
Lygranum antigen is superior to mouse brain antigen in sensitivity and specificity in the performance of the Frei test for lymphogranuloma venereum. Lygranum control is superior also to mouse brain control in producing non-specific reactions in only 2 of 35 persons as compared with 28 of 36 in the case of mouse brain control. In the group of 36 tested only one individual showed a reaction which could be regarded as resulting from hypersensitivity to chick material.
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