Table 2.
Patterns of resistance to first-line anti-tuberculosis drugs
| Type of resistance | New patients (n = 236) n (%) |
Previously treated patients (n = 101) n (%) |
|---|---|---|
| Susceptible to all drugs | 193 (81.8) | 17 (16.8) |
| Any resistance | ||
| S | 25 (10.6) | 68 (67.3) |
| I | 25 (10.6) | 76 (75.2) |
| R | 10 (4.2) | 69 (68.3) |
| E | 7 (3.0) | 52 (51.5) |
| Monoresistance | ||
| S | 13 (5.6) | 3 (3.0) |
| I | 10 (4.2) | 2 (2.0) |
| R | 1 (0.4) | 1 (1.0) |
| E | 0 (0) | 1 (1.0) |
| Total | 24 (10.2) | 7 (6.9) |
| I + R resistant (MDR-TB) | ||
| SIR | 0 (0) | 5 (5.0) |
| IR | 3 (1.3) | 7 (6.9) |
| IRE | 1 (0.4) | 4 (4.0) |
| SIRE | 4 (1.7) | 51 (50.5) |
| Total | 8 (3.4) | 67 (66.3) |
| Other resistancea | ||
| SI | 8 (3.4) | 8 (7.9) |
| SIE | 1(0.4) | 2 (2.0) |
| SR | 0 (0) | 1 (1.0) |
| SRE | 1 (0.4) | 0 (0) |
| Total | 10 (4.2) | 11 (10.9) |
S streptomycin, I isoniazid, R rifampicin, E ethambutol, MDR multidrug-resistant, TB tuberculosis
aDefined as resistance to more than one drug, except for multidrug resistance