Abstract
Leucocytes from purified protein derivative (PPD) skin test positive individuals, after exposure to PPD in vitro, show a significant increase in nitroblue tetrazolium (NBT) dye reduction when compared to leucocytes from PPD negative donors. The active principle was shown to be soluble, and was released from lymphocytes after a rapid, immunologically specific interaction with the sensitising antigen.
Published Version
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More From: The Australian journal of experimental biology and medical science
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