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Chinese Journal of Antituberculosis ›› 2020, Vol. 42 ›› Issue (6): 609-613.doi: 10.3969/j.issn.1000-6621.2020.06.013

• Original Articles • Previous Articles     Next Articles

Analysis of drug susceptibility of 680 patients with multidrug-resistant tuberculosis in Xi’an City from 2015 to 2019

MA Jin-bao*, REN Fei, ZENG Ling-cheng, CHEN Ming-wei()   

  1. *The First Affiliated Hospital of Xi’an Jiaotong University(*postgraduate student);*Department of Drug-resistance tuberculosis, Xi’an Chest Hospital, Xi’an 710100,China (*work unit)
  • Received:2020-01-31 Online:2020-06-10 Published:2020-06-11
  • Contact: CHEN Ming-wei E-mail:chenmw36@163.com

Abstract:

Objective A retrospective analysis of drug susceptibility test (DST) results of multidrug-resistant tuberculosis(MDR-TB) patients was carried out to provide evidence for guiding clinical drug administration for MDR-TB patients. Methods All of 680 MDR-TB patients in Xi’an City from 2015 to 2019 were selected as study subjects. The DST results of ethambutol (EMB), streptomycin (Sm), protionamide (Pto), amikacin (Am), capreomycin (Cm), P-aminosalicylic acid (PAS), levofloxacin (Lfx) and moxifloxacin (Mfx) were collected and analyzed. Results (1)The rates of resistance to different drugs could be listed from high to low as: Sm (85.7% (583/680)), Lfx (40.1% (273/680)), EMB (37.5% (255/680)), Mfx (31.3% (213/680)), PAS (14.4% (98/680)), Pto (4.6% (31/680)), Am (4.4% (30/680)), and Cm (4.3% (29/680));(2)The rates of resistance to several second-line anti-tuberculosis drugs decreased from 2015 to 2019:Am (from 6.9% decreased to 3.0%,$\chi^{2}_{trends}$=2.78,P=0.096), Cm (10.3%/3.0%,$\chi^{2}_{trends}$=6.96,P=0.008), Lfx (55.2%/28.4%,$\chi^{2}_{trends}$=24.97,P=0.000), Mfx (43.1%/22.9%,$\chi^{2}_{trends}$=16.45,P=0.000), Pto (6.9%/6.0%,$\chi^{2}_{trends}$=0.44,P=0.506), Pas (20.7%/8.0%,$\chi^{2}_{trends}$=7.79,P=0.005).(3)Cross resistance of second-line anti-tuberculosis drugs: among 30 cases resistant to Am, 21 (70.0%) cases were resistant to Cm; in 29 cases resistant to Cm, 21 (72.4%) cases were resistant to Am; 205 (75.1%) cases were resistant to Mfx in 273 Lfx-resistant cases, 205 (96.2%) cases were resistant to Lfx in 213 Mfx-resistant cases. Conclusion In these 5 years, MDR-TB patients in Xi’an City kept a high resistance rate to EMB and Sm. The drug resistance rates of second-line anti-tuberculosis drugs decreased, but we still need to pay attention to the high resistance rate of quinolone. Those resistance rates to different drug and high cross-resistance rate among second-line anti-tuberculosis drugs should be considered when selecting drugs.

Key words: Drug resistance, multiple, Microbial sensitivity tests, Data interpretation, statistical, Xi’an