Table 7.

Assessment of the minimum number of specimens necessary for CA for smear-negative TB patients

PatientNo. of specimensaNo. of true-positive specimensbRate of true-positive specimens (%)No. of CA-positive specimensSequential no. of first CA-positive specimencLocalization of infection
554410041Urogenital organs
5435510021Lungs
2665510021Lungs
1761110011Lungs
2221110011Lymph node
5053310022Lungs
2871011017Lungs
3569555.618Lungs
354331000Lungs
5366116.70Mediastinal lymph node
5873133.30Pulmonary lymph node
  • a Includes only specimens drawn from the site of infection before initiation of therapy. For details, see Materials and Methods.

  • b See also the definition of the adapted gold standard in Materials and Methods.

  • c As determined after ordering the specimens of each patient by the time of receipt.