Comparative study on the diagnostic value of four pathogenic methods in the detection of Mycobacterium tuberculosis in sputum specimens
10.3969/j.issn.1006-2483.2021.06.026
- VernacularTitle:四种病原学方法在检测痰液标本中结核杆菌的诊断价值对比
- Author:
Yu LIU
1
;
Hongyi FU
1
;
Jinhao SUN
1
;
Ming LIU
1
;
Lei TAO
1
Author Information
1. Hebei Chest Hospital , Shijiazhuang 050041 , China
- Publication Type:Journal Article
- Keywords:
Pathogenic testing;
Sputum;
Mycobacterium tuberculosis;
Diagnostic efficiency;
Acid-fast staining
- From:
Journal of Public Health and Preventive Medicine
2021;32(6):107-110
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the different diagnostic values of acid-fast staining, tuberculosis culture, tuberculosis DNA detection (TB-DNA), tuberculosis RNA constant temperature amplification technology (SAT-TB) in the detection of Mycobacterium tuberculosis in sputum specimens. Methods A total of 200 pulmonary tuberculosis patients and 80 non-tuberculosis patients who were hospitalized in Hebei Chest Hospital between September 2015 and September 2019 were selected for this study. Sputum samples were collected after admission, and the detection values of acid-fast staining, tuberculosis culture, TB-DNA, and SAT-TB in sputum samples were statistically analyzed. Results The differences in the sensitivity, accuracy, positive predictive value, and negative predictive values of the four diagnostic methods of acid-fast staining, tuberculosis culture, TB-DNA, and SAT-TB were statistically significant (P <0.05). In terms of diagnostic sensitivity, accuracy and negative predictive value, the values were SAT-TB> TB-DNA> tuberculosis culture> acid-fast staining. In terms of the positive predictive value of diagnosis, the values of SAT-TB, TB-DNA, and tuberculosis culture were higher than that of acid-fast staining. The Kappa values of the four methods and the gold standard were: Kappa (acid-fast staining) = 0.145, Kappa (tuberculosis culture) = 0.395, Kappa (TB-DNA) = 0.602, and Kappa (SAT-TB) = 0.770. Conclusion The four diagnostic methods of acid-fast staining, tuberculosis culture, TB-DNA, and SAT-TB all had certain detection value with their advantages and disadvantages. SAT-TB was a better detection method with high specificity, good sensitivity, and a short detection timer, which could quickly identify bacteria and distinguish live bacteria.
