Abstract
Objective To investigate the clinical value of GeneXpert in the rapid diagnosis of rifampicin resistance in tuberculosis and extrapulmonary tuberculosis. Methods From June 2018 to March 2019, a total of 122 tuberculosis patients admitted to the People's Hospital of Yueqing were selected.Among them, 109 patients with pulmonary tuberculosis and 13 patients with extrapulmonary tuberculosis.GeneXpert MTB/RIF, smear, LJ solid medium, BACTEC MGIT 960 liquid medium four detection methods were used to detect tuberculosis secretion.GeneXpert MTB/RIF, LJ solid medium, BACTEC MGIT 960 liquid medium three detection methods were used to detect extrapulmonary tuberculosis secretion.The sensitivity and specificity of GeneXpert MTB/RIF, smear, LJ solid medium, BACTEC MGIT 960 liquid medium for tuberculosis specimens were detected and compared, and the monitoring results of rifampicin resistance in extracorporeal tuberculosis specimens in culture medium detected by GeneXpert MTB/RIF, LJ solid medium, BACTEC MGIT 960 liquid were observed. Results The GeneXpert MTB/RIF, smear, LJ solid medium, BACTEC MGIT 960 liquid medium were used to detect 109 cases of tuberculosis, and the detection rates were 94.50%(103/109), 55.04%(60/109), 57.79% (63/109), 61.47%(67/109), respectively.The detection rates of extrapulmonary tuberculosis were 7.69%(1/13), 0.00%(0/13) and 15.38%(2/13), respectively.The sensitivity and specificity of the four methods for the diagnosis of tuberculosis had statistically significant differences(χ2=121.540, 127.610, all P 0.05). Conclusion GeneXpert technology has the advantages of simple operation, rapid detection and high detection rate.It has high clinical value for the rapid diagnosis of tuberculosis and extrapulmonary specimens and the detection of rifampicin resistance. Key words: Tuberculosis, pulmonary; Specimen handling; Nucleic acid amplification techniques; Smear layer; Culture media; Diagnosis; Rifampin; Sensitivity and specificity
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