Table 2 Number of positive tests, by TB diagnostic category and test type.

From: Microbiological diagnosis of pulmonary tuberculosis in children by oral swab polymerase chain reaction

 

Confirmed TB

Unconfirmed TB

Unlikely TB

Total

OS1a

12/40 (30%)

11/81 (14%)

0/44 (0%)

23/165 (14%)

OS2

12/40 (30%)

12/81 (15%)

3/44 (7%)

27/165 (16%)

OS1 or OS2

17/40 (43%)

19/81 (24%)

3/44 (7%)

39/165 (24%)

ISb Xpert MTB/RIFc

23/36 (64%)

0/75 (0%)

0/43 (0%)

23/154 (15%)

  1. aOS1, first oral swab PCR; OS2, second oral swab PCR.
  2. bIS, induced sputum. Of 36 IS culture-positive subjects, 23 (64%) were positive on culture and Xpert, and 13 (36%) were positive on culture only.
  3. c154 samples were tested by Xpert MTB/RIF.
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