Abstract

We were unable to confirm the finding of Crowle that TESA possesses the attribute of immunogenicity and absence of allergenicity which are desired in a non-living antituberculosis vaccine. This disagreement could be a function of the particular lot of TESA examined and/or differences in the animal test systems used for the assay of protective potency. The relative contribution of these two possibilities could be determined by the simultaneous assay of a potent TESA product in different laboratories using different animal models.

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