TABLE 3.

Results of IS6110 PCR test on sputum processed by USP method

PCR resultNo. of samples
CultureaUSP smear
PositiveNegativePositiveNegative
Positive32570
Negative3173
Total (n = 571)328243
Positive34247
Negative1175
Total (n = 565b)343222
  • a Using USP, CDC, or modified Petroff method.

  • b Only 565 of 571 samples were analyzed with USP smear as the gold standard since 6 specimens were USP smear negative but culture positive.