Table 3.

Susceptibility of MTC isolates to four first-line drugs as determined by the LRP and BACTEC 460 systems

DrugaTotal no. of isolates testedNo. of strains with following test resultsb:
Both S BACTEC, S; LRP, RBACTEC, R; LRP, S Both R
RIF 50 47 3
STR 50 48 2
INH 50 41 2 16
EMB 50 47 3
  • a The following drugs were used at the indicated concentrations (in micrograms per milliliter): RMP, 2 (both systems); SM, 0.4 (LRP) and 2 (BACTEC); INH, 0.2 (LRP) and 0.1 (BACTEC); EMB, 5 (LRP) and 7.5 (BACTEC).

  • b Abbreviations: S, susceptible; R, resistant.