Study of fitness by growth curve: length of lag phase and rate of growth of each strain.

S: susceptible to first and second-line drugs tested; MDR: multidrug resistant strain. Demo Rep Congo: Democratic Republic of Congo.S：对所测试的一线及二线药物敏感（susceptible）；MDR：多药耐药菌株（multidrug resistant strain）。Demo Rep Congo：刚果民主共和国（Democratic Republic of Congo）。