Mean CFU counts in the lungs of untreated and drug-treated MAC 905-infected beige mice. Standard deviations are not shown for clarity. Mice (10 to 16 per group) were inoculated intraperitoneally with approximately 107 organisms, and treatments were begun 1 day later. Symbols: ○, control; +, CLA; ×, AMI; □, INH; ▪, EMB; ▵, INH-CLA; ▴, INH-AMI; ⧫, CLA-AMI; •, INH-AMI-CLA; ◊, INH-EMB-CLA.