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我们对生后种卡介苗做结素试验的婴儿2～4年后回访做第二次结素试验。结果表明:种卡介苗后2年、3年和4年3组的OT阳转维持率分别为73.7％、67.3％和63.4％,3组之间无显著性差异,而与第1次OT阳性率比较有明显下降;第1次OT均径与卡痕均径之间有相关关系,卡痕在以后一段时间内仍有明显缩小,但仅有3％的儿童卡痕难以辨认。本结果说明卡介苗引起的迟发性皮肤变态反应,其OT阳转维持率在1年内明显下降,而在以后的2～4年中无明显变化。
We are born after the end of BCG test done by the end of 2 to 4 years after the baby back to do the second knot test. The results showed that the maintenance rate of OT in 3, 4 and 4 years after BCG vaccination was 73.7%, 67.3% and 63.4%, respectively. There was no significant difference between the 3 groups There was a significant correlation between the average diameter of the OT and the average diameter of the card marks. The mark of the card was still significantly reduced in a period of time, but only 3% of the children’s card marks were unidentifiable. This result shows that BCG-induced delayed skin allergy, its OT positive rate of maintenance in 1 year decreased significantly, but in the next 2 to 4 years no significant change.