Clinical value of colloidal gold in the detection of tuberculosis antibody

Objective To discuss the clinical value of tuberculosis antibody in the diagnosis of active tuberculosis. Methods The patients were divided into the active,non-active tuberculosis group and the healthy group, and the active group was further divided into the sputum positive group and the sputum negative group. The tuberculosis antibody was detected by colloidal gold method. Results We calculated sensitivity,specificity,false positive rate,false negative rate,Youden index,consistence rate,positive predictive value and negative predictive value. The positive rate of tuberculosis antibody was 74. 5% in the sputum positive group and 56. 0% in the sputum negative group(P 0. 01). Conclusion The detection of tuberculosis antibody by colloidal gold is effective in diagnosis of active TB,as well as non-tuberculosis and healthy people.