Table 2.

Frequency of first and second-line drug resistance of MDR-TB in HCMC, 2011–2015

Drug resistance	n/ total tested (%)
Patients with DST resulta	490
First line drugs
Pyrazinamide	210/382 (55.0%)
Ethambutol	298/472 (63.1%)
Streptomycin	438/455 (96.3%)
Second-line drugs
Fluoroquinolonesb	48/378 (12.7%)
Any injectable agentsc	31/384 (8.1%)
All injectable agents	9/115 (7.8%)
Cycloserine	2/240 (0.8%)
Ethionamide/Prothionamide	21/223 (9.4%)

^a A total of 502 DST of 490 patients were retrievable

^b fluoroquinolones include moxifloxacin, levofloxacin, ofloxacin

^c injectable agents include kanamycin, amikacin and capreomycin