The SSM （sputum smear microscopy） and five immunochromatographic tuberculosis antibody detection tests （DiaSpot TB, Spodex TB, SD Rapid TB, Clinotech TB Screen and Precious One-step TB） were compared for diagnosis...The SSM （sputum smear microscopy） and five immunochromatographic tuberculosis antibody detection tests （DiaSpot TB, Spodex TB, SD Rapid TB, Clinotech TB Screen and Precious One-step TB） were compared for diagnosis of active TB at the Leprosy and Tuberculosis Referral Hospital, Uzuakoli, Abia State, Nigeria. Sputum specimens from 150 study participants （male/female ratio, 0.81） were cultured on Lowenstein-Jensen slopes and direct smears were stained by Ziehl-Neelsen technique and examined by light microscopy. Sera were tested for anti-TB antibodies using the rapid TB tests. A total of 91 participants were culture positive, 79 （86.8%） for M. tuberculosis and 12 （13.2%） for nontuberculous mycobacteria. The sensitivity of SSM was 50% （95% CI： 39.0-61.0） and specificity was 92.3% （95% CI： 86.4-98.2） in those culture positive for M. tuberculosis. The sensitivity and specificity of the Rapid TB tests ranged from 24.1-39.2% and 78.4-87.8%, respectively. None of the five rapid TB tests had acceptable level of accuracy for diagnosis of active TB. The sensitivity of SSM though moderate is inadequate for long term TB control in this setting.展开更多
AIM: Although the quality of currently available urinary tests for detecting antibody to Helicobacter pylori (H pylori)have been proved in some populations, the accuracy has not been studied regarding patients who suf...AIM: Although the quality of currently available urinary tests for detecting antibody to Helicobacter pylori (H pylori)have been proved in some populations, the accuracy has not been studied regarding patients who suffer from pulmonary tuberculosis with multi-drug treatments. The present study was conducted to evaluate the accuracy of these urinary tests for antibody to H pylori in these patients.METHODS: Serum samples from 61 inpatients with pulmonary tuberculosis were tested using enzyme immunoassay, and urine samples were assayed by enzyme-linked immunosorbent assay method (URINELISA) and immunochromatography method (RAPIRAN). Medicines prescribed to the patients were recorded for medical charts, to evaluate the influences on the results of urinary tests.RESULTS: The sensitivity, specificity, and consistency of URINELISA against the serum test were 93.1%, 65.6%, and 78.6% respectively, and those of RAPIRAN were 86.2%,93.7%, and 90.1% respectively, which were almost equal to the data previously reported. Prescribed medicines had little influence on the results.CONCLUSION: The two urinary tests for detecting H pylori antibody have a diagnostic accuracy in patients with pulmonary tuberculosis given multiple anti-tuberculosis drugs.展开更多
Background: The diagnosis of bacterium-negative pulmonary tuberculosis(TB) and extra-pulmonary TB is challenging clinically. The detection of the anti-TB antibody has an important, auxiliary, clinical diagnostic value...Background: The diagnosis of bacterium-negative pulmonary tuberculosis(TB) and extra-pulmonary TB is challenging clinically. The detection of the anti-TB antibody has an important, auxiliary, clinical diagnostic value. Therefore, TB antibody detection kits should be screened and evaluated, and the reagents with the highest sensitivity and specificity should be chosen and used clinically.Methods: The diagnostic performance of 7 commercially available TB antibody detection kits(kits A, B, C, D, E, F and G) based on the gold immunoassay detection of immunoglobulin(Ig) G or IgM antibodies were simultaneously evaluated and compared in 62 TB cases and 56 non-TB cases in a laboratory. A retrospective analysis including 2549 cases was carried out to assess the clinical diagnosis values of bacteriological examinations and TB antibody tests(kits B and H used in the clinic).Results: The sensitivities of TB antibody kits A, B, C, D, E, F and G in the sera from 62 TB patients were 50.0%, 83.9%, 38.7%, 9.7%, 48.4%, 69.4% and 79.0%, respectively; the sensitivities in the sera from 24 smear-negative TB patients were 29.2%, 79.2%, 29.2%, 12.5%, 29.2%, 54.2% and 79.2%, respectively; the specificities in the sera from 56 nonTB patients were 73.2%, 25.0%, 85.7%, 96.4%, 78.6%, 78.6% and 50.0%, respectively. Of the 2549 clinically diagnosed cases, there were 1752 pulmonary TB cases, 505 extra-pulmonary TB cases, 87 old pulmonary TB cases and 205 non-TB cases. The positive results for smear, culture, TB antibody kit B and kit H in pulmonary TB cases were 39.8%(543/1365), 48.6%(372/765), 45.8%(802/1752) and 25.2%(442/1752), respectively; the results in extra-pulmonary TB cases were 3.4%(6/178), 5.8%(4/69), 35.4%(179/505), and 11.3%(57/505), respectively; the results in old pulmonary TB cases were 0%(0/64), 0%(0/30), 32.2%(28/87), and 9.2%(8/87), respectively; and the results in non-TB cases were 0%(0/121), 0%(0/56), 21.5%(44/205), and 2.4%(5/205), respectively. Of 624 smear-positive and/or culture-positive pulmonary TB cases, the sensitivities of antibody test kits B and H were 53.0% and 36.4%, respectively. Of 901 smear-negative and/or culture-negative pulmonary TB cases, the sensitivities of antibody test kits B and H were 42.5% and 19.0%, respectively. The positive rate of antibody detection in the bacterium-positive pulmonary TB cases was significantly higher than that in the bacterium-negative pulmonary TB cases(P<0.05).Conclusion: The colloidal gold-labeled TB antibody IgG detection assay is a simple, rapid and economical method that provides a better clinical auxiliary diagnosis value on TB, especially in smear-negative pulmonary TB and extrapulmonary TB. The production, quality control, screening and evaluation of antibody detection kits are very important for its clinical application.展开更多
文摘The SSM （sputum smear microscopy） and five immunochromatographic tuberculosis antibody detection tests （DiaSpot TB, Spodex TB, SD Rapid TB, Clinotech TB Screen and Precious One-step TB） were compared for diagnosis of active TB at the Leprosy and Tuberculosis Referral Hospital, Uzuakoli, Abia State, Nigeria. Sputum specimens from 150 study participants （male/female ratio, 0.81） were cultured on Lowenstein-Jensen slopes and direct smears were stained by Ziehl-Neelsen technique and examined by light microscopy. Sera were tested for anti-TB antibodies using the rapid TB tests. A total of 91 participants were culture positive, 79 （86.8%） for M. tuberculosis and 12 （13.2%） for nontuberculous mycobacteria. The sensitivity of SSM was 50% （95% CI： 39.0-61.0） and specificity was 92.3% （95% CI： 86.4-98.2） in those culture positive for M. tuberculosis. The sensitivity and specificity of the Rapid TB tests ranged from 24.1-39.2% and 78.4-87.8%, respectively. None of the five rapid TB tests had acceptable level of accuracy for diagnosis of active TB. The sensitivity of SSM though moderate is inadequate for long term TB control in this setting.
文摘AIM: Although the quality of currently available urinary tests for detecting antibody to Helicobacter pylori (H pylori)have been proved in some populations, the accuracy has not been studied regarding patients who suffer from pulmonary tuberculosis with multi-drug treatments. The present study was conducted to evaluate the accuracy of these urinary tests for antibody to H pylori in these patients.METHODS: Serum samples from 61 inpatients with pulmonary tuberculosis were tested using enzyme immunoassay, and urine samples were assayed by enzyme-linked immunosorbent assay method (URINELISA) and immunochromatography method (RAPIRAN). Medicines prescribed to the patients were recorded for medical charts, to evaluate the influences on the results of urinary tests.RESULTS: The sensitivity, specificity, and consistency of URINELISA against the serum test were 93.1%, 65.6%, and 78.6% respectively, and those of RAPIRAN were 86.2%,93.7%, and 90.1% respectively, which were almost equal to the data previously reported. Prescribed medicines had little influence on the results.CONCLUSION: The two urinary tests for detecting H pylori antibody have a diagnostic accuracy in patients with pulmonary tuberculosis given multiple anti-tuberculosis drugs.
基金supported by a grant from the Key Project of Army "Twelfth Five-year Plan" Scientific Research Foundation(BWS11J050)
文摘Background: The diagnosis of bacterium-negative pulmonary tuberculosis(TB) and extra-pulmonary TB is challenging clinically. The detection of the anti-TB antibody has an important, auxiliary, clinical diagnostic value. Therefore, TB antibody detection kits should be screened and evaluated, and the reagents with the highest sensitivity and specificity should be chosen and used clinically.Methods: The diagnostic performance of 7 commercially available TB antibody detection kits(kits A, B, C, D, E, F and G) based on the gold immunoassay detection of immunoglobulin(Ig) G or IgM antibodies were simultaneously evaluated and compared in 62 TB cases and 56 non-TB cases in a laboratory. A retrospective analysis including 2549 cases was carried out to assess the clinical diagnosis values of bacteriological examinations and TB antibody tests(kits B and H used in the clinic).Results: The sensitivities of TB antibody kits A, B, C, D, E, F and G in the sera from 62 TB patients were 50.0%, 83.9%, 38.7%, 9.7%, 48.4%, 69.4% and 79.0%, respectively; the sensitivities in the sera from 24 smear-negative TB patients were 29.2%, 79.2%, 29.2%, 12.5%, 29.2%, 54.2% and 79.2%, respectively; the specificities in the sera from 56 nonTB patients were 73.2%, 25.0%, 85.7%, 96.4%, 78.6%, 78.6% and 50.0%, respectively. Of the 2549 clinically diagnosed cases, there were 1752 pulmonary TB cases, 505 extra-pulmonary TB cases, 87 old pulmonary TB cases and 205 non-TB cases. The positive results for smear, culture, TB antibody kit B and kit H in pulmonary TB cases were 39.8%(543/1365), 48.6%(372/765), 45.8%(802/1752) and 25.2%(442/1752), respectively; the results in extra-pulmonary TB cases were 3.4%(6/178), 5.8%(4/69), 35.4%(179/505), and 11.3%(57/505), respectively; the results in old pulmonary TB cases were 0%(0/64), 0%(0/30), 32.2%(28/87), and 9.2%(8/87), respectively; and the results in non-TB cases were 0%(0/121), 0%(0/56), 21.5%(44/205), and 2.4%(5/205), respectively. Of 624 smear-positive and/or culture-positive pulmonary TB cases, the sensitivities of antibody test kits B and H were 53.0% and 36.4%, respectively. Of 901 smear-negative and/or culture-negative pulmonary TB cases, the sensitivities of antibody test kits B and H were 42.5% and 19.0%, respectively. The positive rate of antibody detection in the bacterium-positive pulmonary TB cases was significantly higher than that in the bacterium-negative pulmonary TB cases(P<0.05).Conclusion: The colloidal gold-labeled TB antibody IgG detection assay is a simple, rapid and economical method that provides a better clinical auxiliary diagnosis value on TB, especially in smear-negative pulmonary TB and extrapulmonary TB. The production, quality control, screening and evaluation of antibody detection kits are very important for its clinical application.
