All groups had PPD skin test, and serums were sampled in two copies.
各组均做PPD试验，并且均留取两份血清标本。
PPD skin test was used in parallel with Elispot in some healthy controls and close contacts.
对健康对照和密切接触者同时还进行平行的PPD皮试。
Result The PPD skin test were negative in 5 cases AIDS complicated with pulmonary tuberculosis.
结果5例艾滋病并发肺结核病的PPD皮试反应均为阴性。
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