Table 2.

Summary of test results for the tuberculous patients with initial false-negative results by Cobas Amplicor MTB

Patient’s age (yr)/sexResults obtained from a single sputum specimenNo. of cumulative positive results obtained from sequential sputum specimenscNo. of sputum specimens examined
SmearCultureRepeated Cobas Amplicor MTBaSmearCultureCobas Amplicor MTB
69/MalePositivePositiveNegative2212
24/MalePositivePositiveNA4434
78/FemalePositivePositivePositive1101
38/MalePositiveNegativeNegative3223
75/FemalePositivePositivePositive1101
63/MalePositivePositivePositiveb 4434
74/MaleNegativePositivePositive0103
69/MaleNegativePositiveNA0323
72/MaleNegativePositiveNA0213
64/FemaleNegativePositivePositive0213
76/FemaleNegativePositiveNegative0313
72/FemaleNegativePositivePositive0102
  • a NA, not available for the repeated Cobas Amplicor MTB.

  • b Specimen containing inhibitory substances. Test was repeated with specimen diluted 1/10.

  • c The results of the repeated Cobas Amplicor MTB were not included in the cumulative results.