Needle Biopsy of the Liver

Abstract

BxnuH 657 host rather than to any direct action of the impurities on penicillin itself. This would explain why the enhancement effect cannot be demonstrated in vitro, and rules out any direct synergistic effect of the impurities on penicillin. We were not able to confirm that the enhancement effect of the impurities caused the higher penicillin blood levels reported by Welch (1947).