Table 1. Summary of the applied drug treatments and their phenotypic consequences.
Treatment | Liquid culture experiments | Agar plate experiments | |||||||
---|---|---|---|---|---|---|---|---|---|
Category | Long name | Abbreviation | Mechanism of action | Subinhinitory concentration | CFU compared to control | Cell length [μm] | Cell width [μm] | Subinhinitory concentration | CFU compared to control |
First line antibiotics | Isoniazid | INH | Cell wall synthesis inhibitor | 150 μg/ml | 80% | 1.8±0.5 | 0.41±0.07 | 2 μg/ml | 2.2 % |
Ethambutol | EMB | 100 μg/ml | 70% | 2.0±0.8 | 0.55±0.17 | 0.2 μg/ml | 10.5 % | ||
Rifampicin | RIF | RNA synthesis inhibitor | 3 μg/ml | 60% | 6.6±2.4 | 0.68±0.09 | 25 μg/ml | 0.00052 % | |
Combination treatment | COMBO | WHO first line therapy | 10 μg/ml PZA, 15 μg/mL INH, 10 μg/ml EMB, 0.3 μg/mL RIF | 6% | 2.8±0.7 | 0.47±005 | 1 μg/ml PZA, 0.2 μg/mL INH, 0.02 μg/ml EMB, 2.5 μg/mL RIF | 0.39 % | |
Second line antibiotics | Ciprofloxacin | CIP | Gyrase inhibitor | 0.3 μg/ml | 20% | 11.1±4.0 | 0.59±0.1 | 0.3 μg/ml | 0.00018 % |
DNA damage controls | Mitomycin-C | MMC | DNA alkylation | 0.01 μg/ml | 20% | 9.8±4.6 | 0.68±0.11 | 0.0005 μg/ml | 0.96 % |
Ultraviolet radiation | UV | Pyr dimers, DSBs | ND | ND | ND | ND | 150 J/m2 | 11 % | |
N/A | Non-treated | Mock | N/A | N/A | 100% | 2.8±0.9 | 0.44±0.08 | N/A | 100 % |