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| The differences of Xpert MTB/RIF and BACTEC MGIT960 in detecting Mycobacterium tuberculosis and Rifampin resistance |
| CHEN Junlin1 HUANG Fei1 XU Feifan1 GU Delin1▲ HU Zhongyi2 |
1.Department of Tuberculosis Medical, the Sixth People's Hospital of Nantong, Jiangsu Province, Nantong 226011, China；
2.Department of Laboratory, Shanghai Pulmonary Hospital, Affiliated to Tongji University, Shanghai 200433, China |
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Abstract Objective To explore the differences between Xpert MTB/RIF and BACTEC MGIT960 in detecting Mycobacterium tuberculosis (MTB) and Rifampin (RFP) resistance. Methods From June 2014 to June 2017, sputum specimens from 188 retreated smear positive pulmonary tuberculosis patients in the Sixth People's Hospital of Nantong were selected as research objects. Xpert MTB/RIF and BACTEC MGIT960 were used to detect MTB in the sputum specimens of the patients and the RFP resistance was analyzed combined with the medical history. Results Then were 146 cases of consistency results between Xpert MTB/RIF and BACTEC MGIT960 in detecting MTB, while 38 cases of heterogeneity. The number of cases in Xpert MTB/RIF group was higher than that of BACTEC MGIT960 group in the use of the drug with rifamycin and the duration above 3 months, with statistically significant difference (χ2=6.31，P ＜ 0.05). There were no statistically significant differences between Xpert MTB/RIF and BACTEC MGIT960 in the comparison of other medical history groups (P ＞ 0.05). Conlusion The results of Xpert MTB/RIF and BACTEC MGIT960 in detecting MTB and RFP resistance from sputum specimens of smear positive are differential. It may be associated with medical history of the patients. Clinical physicians should pay attention to the differences of the two detection methods and formulate anti-tuberculosis treatment plan accurately.
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