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Table 1 Performance of line probe assay (LPA) in smear-positive sputum specimens compared with conventional drug susceptibility testing (MGIT DST)

From: Rapid screening of MDR-TB using molecular Line Probe Assay is feasible in Uganda

   MGIT DST     
   INHR RIFR INHR RIFS INHS RIFR INHS RIFS No result*
LPA INH R RIF R 12 3 0 0 4
  INH R RIF S 0 6 0 0 0
  INH S RIF R 1 0 2 1 2
  INH S RIF S 0 4 0 63 15
  Indeterminate 0 0 0 0 5
  1. LPA, line probe assay
  2. MGIT DST, Mycobacterial Growth Indicator Tube
  3. RIFS, rifampicin susceptible; RIFR, rifampicin resistant
  4. INHS, isoniazid susceptible; INHR, isoniazid resistant
  5. * No result was due to lack of growth from the frozen primary isolate (15), isolation of non-tuberculous mycobacteria (1), contamination (2) or unavailability of frozen isolate for MGIT DST (8).
  6. Indeterminate results included are those remaining without an interpretable result after repeat testing.