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Chinese Journal of Antituberculosis ›› 2019, Vol. 41 ›› Issue (4): 447-451.doi: 10.3969/j.issn.1000-6621.2019.04.015

• Original Articles • Previous Articles     Next Articles

A comparative study of the efficacy of standard multidrug-resistant tuberculosis chemotherapy regimen for MDR-TB patients with pyrazinamide resistance or not

Bi-tong WU,Hao-bin KUANG,Zhi-hui LIU,Xing-shan CAI,Hong-juan QIN,Fan-rong MENG,Li-lan WU,Zhao-yuan LIN,De-hu PENG,Shou-yong TAN()   

  1. Department of Tuberculosis, Guangzhou Chest Hospital, 510095 Guangzhou, China
  • Received:2018-11-08 Online:2019-04-10 Published:2019-04-08
  • Contact: Shou-yong TAN E-mail:tanshouyong@163.com

Abstract:

Objective To explore the the short-term and long-term efficacy of standard multidrug-resistant tuberculosis (MDR-TB) chemotherapy regimen including PZA for MDR-TB patients with or without pyrazinamide resistance. Methods A retrospective cohort study was conducted to select 60 MDR-TB patients treated in Guangzhou Chest Hospital from January 1, 2015 to December 31, 2015; sputum culture showed the growth of Mycobacterium tuberculosis using BACTEC MGIT 960, and resistance to Isoniazid, Rifampicin and PZA (Z R-MDR group) were found by drug sensitive test. According to the 1∶1 principle, 60 multidrug resistant-tuberculosis patients were selected as control group (Z S-MDR group), the age difference was less than 5 years and the concurrent drug sensitivity test showed that they are sensitive to PZA. All patients were treated with chemotherapy regimen with 6Am-Lfx(Mfx)-PZA-Pto-Cs(PAS)/18Lfx(Mfx)-PZA-Pto-Cs(PAS). The sputum negative conversion rate, the absorption rate of lesions, the rate of cavity reduction, the cure rate and failure rate were conducted and analysed statistically. Results At the end of the 2,6,12, and 24 months after undergoing the treatment, sputum negative conversion rates of Z S-MDR patients were 70.00% (42/60), 90.00% (54/60), 86.67% (52/60) and 86.67% (52/60), respectively, which were statistically higher than those of Z R-MDR group (46.67% (28/60), 66.67% (40/60), 70.00% (42/60) and 70.00% (42/60), respectively; χ 2=6.720, 9.624, 4.910 and 4.910, respectively; and all P<0.05).At the end of the treatment, the absorption rate of lesions (81.67% (49/60) vs. 65.00% (39/60), χ 2=4.264,P=0.019), cure rate (86.67% (52/60) vs. 70.00% (42/60), χ 2=4.910, P=0.016) and failure rate (13.33% (8/60) vs. 30.00% (18/60), χ 2=4.910, P=0.016) in Z S-MDR group were statistically different from those in Z R-MDR group. However, as to the rate of cavity reduction, there was no statistically significant difference between the two groups (76.92% (40/52)vs. 62.00% (31/50, χ 2=2.681, P=0.098). Conclusion The efficacy of standard MDR-TB chemotherapy regimen in MDR-TB patients with PZA resistance for the whole course, was worse than in MDR-TB patients without PZA. Therefore, MDR-TB patients with PZA resistance were recommended tobe treated with the multi-drug regimen without PZA.

Key words: Tuberculosis, pulmonary, Tuberculosis, multidrug-resistant, Pyrazinamide, Drug therapy, combination, Comparative effectiveness research