From: Prevalence and patterns of drug resistance among pulmonary tuberculosis patients in Hangzhou, China
 | Type of TB resistance | New cases (N = 1020) | Treated cases (N = 306) | ||
---|---|---|---|---|---|
n | % | n | % | ||
Resistance to any first-line drugs | 184 | 18.0 | 112 | 36.6 | |
Resistance to individual drugs in any tests | |||||
 Isoniazid | 102 | 10.0 | 89 | 29.1 | |
 Rifampin | 57 | 5.6 | 78 | 25.5 | |
 Ethambutol | 15 | 1.5 | 23 | 7.5 | |
 Streptomycin | 119 | 11.7 | 58 | 19.0 | |
 Ofloxacin | 20 | 2.0 | 15 | 4.9 | |
 Kanamycin | 7 | 0.7 | 4 | 1.3 | |
Resistance to single drug only | |||||
 Isoniazid | 33 | 3.2 | 15 | 4.9 | |
 Rifampin | 15 | 1.5 | 8 | 2.6 | |
 Ethambutol | 2 | 0.2 | 0 | 0 | |
 Streptomycin | 57 | 5.6 | 10 | 3.3 | |
 Ofloxacin | 14 | 1.4 | 3 | 1.0 | |
 Kanamycin | 2 | 0.2 | 0 | 0 | |
Resistance to two drugs | |||||
 Isoniazid+ethambutol | 1 | 0.1 | 1 | 0.3 | |
 Isoniazid+streptomycin | 27 | 2.7 | 3 | 1.0 | |
 Rifampin+ethambutol | 1 | 0.1 | 0 | 0 | |
 Rifampin+streptomycin | 3 | 0.3 | 1 | 0.3 | |
 Ethambutol+streptomycin | 1 | 0.1 | 1 | 0.3 | |
 Rifampin+ofloxacin | 0 | 0 | 1 | 0.3 | |
 Streptomycin+ofloxacin | 2 | 0.2 | 1 | 0.3 | |
 Isoniazid+ofloxacin | 1 | 0.1 | 1 | 0.3 | |
 Streptomycin+ kanamycin | 1 | 0.1 | 0 | 0 | |
 Isoniazid+rifampin | 9 | 0.9 | 19 | 6.2 | |
Resistance to three drugs | |||||
 Isoniazid+rifampin+ethambutol | 0 | 0 | 6 | 2.0 | |
 Isoniazid+rifampin+Streptomycin | 16 | 1.6 | 24 | 7.8 | |
 Ethambutol+streptomycin+ofloxacin | 0 | 0 | 1 | 0.3 | |
 Isoniazid+rifampin+ofloxacin | 1 | 0.1 | 1 | 0.3 | |
 Isoniazid+rifampin+kanamycin | 1 | 0.1 | 0 | 0 | |
 Isoniazid+ethambutol+ofloxacin | 0 | 0 | 1 | 0.3 | |
Resistance to four drugs | |||||
 Isoniazid+rifampin+ethambutol+streptomycin | 8 | 0.8 | 10 | 3.3 | |
 Isoniazid+rifampin+ethambutol+ofloxacin | 0 | 0 | 2 | 0.7 | |
 Isoniazid+rifampin+streptomycin+ofloxacin | 1 | 0.1 | 1 | 0.3 | |
 Isoniazid+rifampin+streptomycin+kanamycin | 0 | 0 | 2 | 0.7 | |
Resistance to five drugs | |||||
 Isoniazid+rifampin+ethambutol+streptomycin+ofloxacin | 0 | 0 | 2 | 0.7 | |
 Isoniazid+rifampin+ethambutol+streptomycin+kanamycin | 1 | 0.1 | 0 | 0 | |
Multi-drug resistance (MDR) | 38 | 3.7 | 68 | 22.2 | |
Extensive drug resistance (XDR) | |||||
 Isoniazid+rifampin+ofloxacin+kanamycin (or cycloserine)a | 1 | 0.1 | 2 | 0.7 |