RESUMO
Objective To evaluate the bacteriostasis of sulfamethoxazole(SMZ)combined with trimethoprim(TMP)against My‐cobacterium tuberculosis(MTB) in vitro ,so as to provide basis for clinical application .Methods The minimal inhibitory concentra‐tion(MIC) value of TMP/SMZ against MTB ,including standard sensitive strain(H37Rv) ,clinical sensitive strains(20 strains) and clinical multiple‐drug‐resistance strains(MDR ,30 strains) ,was detected by using MPP observation method .Results The MIC val‐ue of standard strain H37Rv was TNP(0 .5 μg/mL)+SMZ(9 .5 μg/mL) .The growth of 40 strains(accounted for 80% ) of clinical isolates ,including 17 sensitive strains and 23 MDR strains ,could be inhibited by TMP(1 μg/mL)+ SMZ(19 μg/mL) compound . Conclusion TMP combined with SMZ may has good antibacterial activity for strains of MTB in vitro .