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A Novel Quantum Dots-Based Point of Care Test for Syphilis

Yang, Hao and Li, Ding and He, Rong and Guo, Qin and Wang, Kan and Zhang, Xueqing and Huang, Peng and Cui, Daxiang (2010) A Novel Quantum Dots-Based Point of Care Test for Syphilis. Nanoscale Research Letters, 5 (5). pp. 875-881.

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Abstract

One-step lateral flow test is recommended as the first line screening of syphilis for primary healthcare settings in developing countries. However, it generally shows low sensitivity. We describe here the development of a novel fluorescent POC (Point Of Care) test method to be used for screening for syphilis. The method was designed to combine the rapidness of lateral flow test and sensitiveness of fluorescent method. 50 syphilis-positive specimens and 50 healthy specimens conformed by Treponema pallidum particle agglutination (TPPA) were tested with Quantum Dot-labeled and colloidal gold-labeled lateral flow test strips, respectively. The results showed that both sensitivity and specificity of the quantum dots–based method reached up to 100% (95% confidence interval [CI], 91–100%), while those of the colloidal gold-based method were 82% (95% CI, 68–91%) and 100% (95% CI, 91–100%), respectively. In addition, the naked-eye detection limit of quantum dot–based method could achieve 2 ng/ml of anti-TP47 polyclonal antibodies purified by affinity chromatography with TP47 antigen, which was tenfold higher than that of colloidal gold–based method. In conclusion, the quantum dots were found to be suitable for labels of lateral flow test strip. Its ease of use, sensitiveness and low cost make it well-suited for population-based on-the-site syphilis screening.

Item Type:Article
Uncontrolled Keywords:Syphilis - Lateral flow - Diagnostics - Quantum dots - Nanomaterial
Subjects:Biomedical Science > Nanotechnology for human health
Biomedical Science > Nanomedicine
ID Code:8998
Deposited By:Lesley Tobin
Deposited On:27 Jul 2010 15:13
Last Modified:27 Jul 2010 15:13

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