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Xu S, Li H, Wu X, Guo J, Zhang J, Hu X. Confirmation value of Western blotting in detecting anti-treponema pallidum specific antibodies with suspicious results. Eur J Med Res 2022; 27:16. [PMID: 35109919 PMCID: PMC8809024 DOI: 10.1186/s40001-022-00633-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 01/04/2022] [Indexed: 11/30/2022] Open
Abstract
Background Due to the inconsistent results of anti-treponema pallidum (TP) specific antibodies by enzyme-linked immunosorbent assay (ELISA) and Treponema pallidum granule agglutination assay (TPPA) in clinical work, there will be a certain proportion of false-positives and false-negatives depending on TPPA as confirmation results. This study aimed to evaluate the necessity of Western blotting (WB) in samples with inconsistent results in detecting anti-TP antibodies by ELISA and TPPA. Methods Specific anti-TP test results in our clinical laboratory were retrospectively analyzed. The specimens with a positive or a negative result, but with colored ELISA plates, were retested by TPPA. WB was used to confirm the suspicious results between ELISA and TPPA. The Chi-square test was used to analyze whether the difference was statistically significant. Results A total of 106,757 anti-TP specimens were screened by ELISA from August 2018 to December 2019; 3972 were retested by TPPA, and 3809 were positive by TPPA. ELISA and TPPA showed different results in 163 specimens. Among them, 29 specimens were negative and 134 were positive by ELISA; 76 were negative, 23 were positive, and 64 were “reserve” by TPPA; 93 were negative, 31 were positive, and 39 were suspicious by the WB confirmation test. Compared with WB, the difference in the results of ELISA and TPPA was statistically significant. Conclusions TPPA is an effective retest method for anti-TP antibody detection. If the results of anti-TP antibodies by ELISA and TPPA are inconsistent, it is necessary to use WB for confirmation. Trial registration This retrospective analysis is in accordance with the ethical guidelines of China and approved by the second hospital of Jiaxing (jxey-2018048).
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Affiliation(s)
- Siqi Xu
- The Second Hospital of Jiaxing, No. 1518, Huancheng North Road, Nanhu District, Jiaxing, 314000, Zhejiang, China
| | - Hongsheng Li
- The Second Hospital of Jiaxing, No. 1518, Huancheng North Road, Nanhu District, Jiaxing, 314000, Zhejiang, China
| | - Xiaoyan Wu
- The Second Hospital of Jiaxing, No. 1518, Huancheng North Road, Nanhu District, Jiaxing, 314000, Zhejiang, China
| | - Jianwei Guo
- The Second Hospital of Jiaxing, No. 1518, Huancheng North Road, Nanhu District, Jiaxing, 314000, Zhejiang, China
| | - Jiaoli Zhang
- The Second Hospital of Jiaxing, No. 1518, Huancheng North Road, Nanhu District, Jiaxing, 314000, Zhejiang, China
| | - Xuqi Hu
- The Second Hospital of Jiaxing, No. 1518, Huancheng North Road, Nanhu District, Jiaxing, 314000, Zhejiang, China.
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Wang W, Fan X, Huang X, Yan J, Luan J. Serologic false-positive reactions for syphilis in children of adenoidal hypertrophy:2 case reports and review of the literature. Acta Clin Belg 2021; 76:70-74. [PMID: 31368864 DOI: 10.1080/17843286.2019.1649081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Adenoid hypertrophy (AH) is a common disease in children. We describe two cases of AH in children with syphilis enzyme-linked immunosorbent assay (EIA) for false-positive. To our knowledge, there are few reports of false-positive in syphilis EIA in children with AH. Two cases of AH children with syphilis EIA positive samples were confirmed by TPPA and LIA, both showed negative reaction. Therefore, the occurrence of syphilis EIA positive reactions in such diseases should dramatically arouse the attention of docimasters and doctors so as to avoid misdiagnosis caused by false-positive in children with AH.
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Affiliation(s)
- Wei Wang
- Jinling Hospital Department of Blood Transfusion, Nanjing University, School Medicine, Nanjing, China
| | - Xuzhou Fan
- Jinling Hospital Department of Blood Transfusion, Nanjing University, School Medicine, Nanjing, China
| | - Xuelian Huang
- Jinling Hospital Department of Blood Transfusion, Nanjing University, School Medicine, Nanjing, China
| | - Jingmei Yan
- Jinling Hospital Department of Blood Transfusion, Nanjing University, School Medicine, Nanjing, China
| | - Jianfeng Luan
- Jinling Hospital Department of Blood Transfusion, Nanjing University, School Medicine, Nanjing, China
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3
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Marín-Navarrete R, Villalobos-Gallegos L, Medina-Mora ME, Magis-Rodríguez C. Rapid testing and counseling for HIV/STIs in Mexican community-based residential care facilities for substance use disorders: A prospective study protocol. JOURNAL OF SUBSTANCE USE 2019. [DOI: 10.1080/14659891.2019.1572801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Rodrigo Marín-Navarrete
- Clinical Trials Unit on Addiction and Mental Health, National Institute of Psychiatry “Ramón de la Fuente Muñiz” (INPRFM), Mexico City, Mexico
| | - Luis Villalobos-Gallegos
- Clinical Trials Unit on Addiction and Mental Health, National Institute of Psychiatry “Ramón de la Fuente Muñiz” (INPRFM), Mexico City, Mexico
| | - María Elena Medina-Mora
- Global Mental Health Research Center, National Institute of Psychiatry “Ramón de la Fuente Muñiz” (INPRFM), Mexico City, Mexico
| | - Carlos Magis-Rodríguez
- Directorate of Integrative Care, National Center for the Prevention and Control of HIV and AIDS (CENSida), Mexico City, Mexico
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Tong ML, Zhang HL, Zhu XZ, Fan JY, Gao K, Lin LR, Liu LL, Li SL, Lin HL, Lin ZF, Niu JJ, Zheng WH, Yang TC. Re-evaluating the sensitivity of the rabbit infectivity test for Treponema pallidum in modern era. Clin Chim Acta 2016; 464:136-141. [PMID: 27876463 DOI: 10.1016/j.cca.2016.11.031] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Revised: 10/31/2016] [Accepted: 11/18/2016] [Indexed: 11/25/2022]
Abstract
BACKGROUND The rabbit infectivity test (RIT) was previously described as a highly-sensitive method for clinically detecting Treponema pallidum. But our primary study indicated this result may have changed in current antibiotics era. METHODS By inoculating rabbits testis with cerebrospinal fluid (CSF) (n=63) and exudate from hard chancre lesions (n=13), we re-evaluated the sensitivity of RIT in modern era. All isolated T. pallidum strains from the RIT were performed for the strain type based on "CDC subtype/tp0548" method. Chi-square and Fisher's exact tests were used to determine the statistical significance of differences across data sets. RESULTS Result indicated that 2 of 63 CSF (2/63, 3.17%) and 5 of 13 lesion exudate samples (5/13, 38.47%) were positive in the RIT, with a much longer time to detection for CSF samples. Only 1 of 28 samples from patients who admitted treatment with antibiotics prior to clinical exam was positive in the RIT; while 6 of 48 patients, who admitted no recent exposure to antibiotics or was unclear about the medical history, were positive in RIT. DNA sequence analysis revealed 6 strains of 14d/f subtype and one strain of 14a/f subtype. CONCLUSIONS In conclusions, RIT is no longer a highly sensitive method for detecting T. pallidum in clinical samples as before, and is not inadequately considered to be a reference method for measuring the sensitivity of other new methods, such as the PCR. These data represent the first reexamination of the sensitivity of RIT in the post-antibiotic era with a large clinical sample.
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Affiliation(s)
- Man-Li Tong
- Clinical Laboratory, Zhongshan Hospital, Medical College of Xiamen University, Xiamen 361004, China
| | - Hui-Lin Zhang
- Clinical Laboratory, Zhongshan Hospital, Medical College of Xiamen University, Xiamen 361004, China
| | - Xiao-Zhen Zhu
- Clinical Laboratory, Zhongshan Hospital, Medical College of Xiamen University, Xiamen 361004, China
| | - Jin-Yi Fan
- Clinical Laboratory, Zhongshan Hospital, Medical College of Xiamen University, Xiamen 361004, China
| | - Kun Gao
- Clinical Laboratory, Zhongshan Hospital, Medical College of Xiamen University, Xiamen 361004, China
| | - Li-Rong Lin
- Clinical Laboratory, Zhongshan Hospital, Medical College of Xiamen University, Xiamen 361004, China
| | - Li-Li Liu
- Clinical Laboratory, Zhongshan Hospital, Medical College of Xiamen University, Xiamen 361004, China
| | - Shu-Lian Li
- Department of Gynaecology and Obstetrics, Xiamen Huli District Maternity and Child Care Hospital, Xiamen 361000, China
| | - Hui-Ling Lin
- Department of Gynaecology and Obstetrics, Xiamen Huli District Maternity and Child Care Hospital, Xiamen 361000, China
| | - Zhi-Feng Lin
- Department of Gynaecology and Obstetrics, Xiamen Huli District Maternity and Child Care Hospital, Xiamen 361000, China
| | - Jian-Jun Niu
- Clinical Laboratory, Zhongshan Hospital, Medical College of Xiamen University, Xiamen 361004, China; Department of Hospital Infection and Medical Healthy Care, Xiamen Zhongshan Hospital, Fujian Medical University, Xiamen 361004, China
| | - Wei-Hong Zheng
- Department of Neurology, Medical College of Xiamen University, Xiamen 361004, China.
| | - Tian-Ci Yang
- Clinical Laboratory, Zhongshan Hospital, Medical College of Xiamen University, Xiamen 361004, China.
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5
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Huang NL, Ye L, Schneider ME, Du YX, Xu YH, Fan LB, Du WD. Development of a novel protein biochip enabling validation of immunological assays and detection of serum IgG and IgM antibodies against Treponema pallidum pathogens in the patients with syphilis. Biosens Bioelectron 2015; 75:465-71. [PMID: 26364122 DOI: 10.1016/j.bios.2015.08.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 08/05/2015] [Accepted: 08/18/2015] [Indexed: 01/03/2023]
Abstract
In this study, we developed a novel protein biochip methodology that was characterized by dithiobis (succinimidyl undecanoate) (DSU) and specialized for detection of serum IgG and IgM antibodies against Treponema pallidum pathogens in the patients with syphilis, respectively. The biochips were validated by a dimension of atomic force microscope (AFM). The visualized detection limit of IgG antibody on the biochip was 0.39μg/ml. Finally, 286 serum samples from the patients with syphilis were simultaneously tested on the rTpN15-17-47 coated biochips. The results were evaluated in comparison with the assays of T. pallidum particle agglutination (TPPA) and the toluidine red unheated serum test (TRUST). The result demonstrated that the relative positive rate in the 286 patients by biochip was 99.0%, similar to that by TPPA (97.9%, P>0.05) and higher than that by TRUST, (76.2%, P<0.01). The detection specificities were 100% for the biochip and the TPPA and 97.0% for the TRUST. Thus, the protein biochip would provide a useful platform not only for enabling concurrent detection of the infectious antibodies directed against T. pallidum on a larger scale, but also for monitoring therapy modality of the disease.
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Affiliation(s)
- Na-Li Huang
- Department of Biology, School of Life Sciences, Anhui Medical University, Hefei 230032, China
| | - Lei Ye
- Department of Biology, School of Life Sciences, Anhui Medical University, Hefei 230032, China
| | - Marion E Schneider
- Sektion Experimentelle Anaesthesiologie, Universitaetsklinikum Ulm, Ulm 89081, Germany
| | - Yi-Xin Du
- Sektion Experimentelle Anaesthesiologie, Universitaetsklinikum Ulm, Ulm 89081, Germany
| | - Yuan-Hong Xu
- Clinical Laboratory, the First Affiliated Hospital, Anhui Medical University, Hefei 230032, China
| | - Li-Bin Fan
- Department of Biology, School of Life Sciences, Anhui Medical University, Hefei 230032, China
| | - Wei-Dong Du
- Department of Biology, School of Life Sciences, Anhui Medical University, Hefei 230032, China; Sektion Experimentelle Anaesthesiologie, Universitaetsklinikum Ulm, Ulm 89081, Germany; Department of Pathology, Anhui Medical University, Hefei 230032, China.
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6
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An J, Chen Q, Liu Q, Rao C, Li D, Wang T, Tao C, Wang L. Evaluation of the HISCL Anti-Treponema pallidum Assay as a Screening Test for Syphilis. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2015; 22:817-22. [PMID: 25972403 PMCID: PMC4478528 DOI: 10.1128/cvi.00116-15] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 05/05/2015] [Indexed: 02/05/2023]
Abstract
The resurgence of syphilis in recent years has become a serious threat to public health worldwide, and the serological detection of specific antibodies against Treponema pallidum remains the most reliable method for laboratory diagnosis of syphilis. This study examined the performance of the recently launched HISCL anti-Treponema pallidum (anti-TP) assay as a screening test for syphilis in a high-volume laboratory. The HISCL anti-TP assay was tested in 300 preselected syphilis-positive samples, 704 fresh syphilis-negative samples, 48 preselected potentially interfering samples, and 30 "borderline" samples and was compared head to head with the commercially available Lumipulse G TP-N. In this study, the HISCL anti-TP assay was in perfect agreement with the applied testing algorithms with an overall agreement of 100%, comparable to that of Lumipulse G TP-N (99.63%). The sensitivity and specificity of the HISCL anti-TP assay were 100% (95% confidence interval [CI], 98.42% to 100%) and 100% (95% CI, 99.37% to 100%), respectively. Considering the excellent ease of use and automation, high throughput, and its favorable sensitivity and specificity, the HISCL anti-TP assay may represent a new choice for syphilis screening in high-volume laboratories.
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Affiliation(s)
- Jingna An
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan Province, People's Republic of China
| | - Qixia Chen
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan Province, People's Republic of China
| | - Qianqian Liu
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan Province, People's Republic of China
| | - Chenli Rao
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan Province, People's Republic of China
| | - Dongdong Li
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan Province, People's Republic of China
| | - Tingting Wang
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan Province, People's Republic of China
| | - Chuanmin Tao
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan Province, People's Republic of China
| | - Lanlan Wang
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan Province, People's Republic of China
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7
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Bristow CC, Larson E, Javanbakht M, Huang E, Causer L, Klausner JD. A review of recent advances in rapid point-of-care tests for syphilis. Sex Health 2015; 12:119-25. [PMID: 25622292 DOI: 10.1071/sh14166] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Accepted: 11/20/2014] [Indexed: 11/23/2022]
Abstract
Syphilis is a curable disease, yet over 10million people worldwide are infected with syphilis each year. Syphilis case finding and subsequent treatment are key steps in syphilis control and prevention efforts. The advent of rapid point-of-care tests - which require minimal equipment, are easy to perform and are relatively low cost - have the potential to improve syphilis control by allowing for more widespread testing in clinical and non-clinical settings. However, strategies to maximise the potential public health impact of those tests are needed, and those include regulatory oversight, effective supply-chain management and quality assurance systems.
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Affiliation(s)
- Claire C Bristow
- Fielding School of Public Health, University of California Los Angeles, 640 Charles E Young Drive South, Los Angeles, CA 90024, USA
| | - Elysia Larson
- Harvard School of Public Health, 677 Huntington Avenue, Cambridge, Boston, MA 02115, USA
| | - Marjan Javanbakht
- Fielding School of Public Health, University of California Los Angeles, 640 Charles E Young Drive South, Los Angeles, CA 90024, USA
| | - Emily Huang
- David Geffen School of Medicine, University of California Los Angeles, 10833 Le Conte Avenue, Los Angeles, CA 90095, USA
| | - Louise Causer
- The Kirby Institute, Wallace Wurth Building, UNSW Australia,Sydney, NSW 2052, Australia
| | - Jeffrey D Klausner
- Fielding School of Public Health, University of California Los Angeles, 640 Charles E Young Drive South, Los Angeles, CA 90024, USA
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8
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Nie XM, Huang R, Dong CX, Tang LJ, Gui R, Jiang JH. Plasmonic ELISA for the ultrasensitive detection of Treponema pallidum. Biosens Bioelectron 2014; 58:314-9. [DOI: 10.1016/j.bios.2014.03.007] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Revised: 03/02/2014] [Accepted: 03/03/2014] [Indexed: 10/25/2022]
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9
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Gu WM, Yang Y, Wang QZ, Pan BS, Guo W, Wu L, Hu WZ, Yang S, Song BB, Zhang CY. Comparing the performance of traditional non-treponemal tests on syphilis and non-syphilis serum samples. Int J STD AIDS 2013; 24:919-25. [PMID: 23970626 DOI: 10.1177/0956462413491399] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The goal of the present study was to determine the performance of two traditional non-treponemal tests for syphilis. Syphilis sera (n = 209) included different stages of disease, and control sera (n = 247) were from patients with tumours, leprosy, systemic lupus erythematosus, hepatitis, pregnant women and healthy individuals. Treponema pallidum ELISA, Treponema pallidum particle agglutination and rapid treponema-specific tests were used as gold standards. Rapid plasma reagin or toluidine red unheated serum test had a sensitivity and specificity of over 95%. False-negative reactions of rapid plasma reagin and toluidine red unheated serum test were observed mainly in primary and latent syphilis cases, and false-positive reactions were present in systemic lupus erythematosus, hepatitis-infected patients. Overall, both non-treponemal tests had high sensitivities and specificities making the assays attractive as screening tests for syphilis. When examined on WHO reference serum samples and based on lower limits of detection, non-treponemal tests were less sensitive than treponema-specific tests.
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Affiliation(s)
- Wei-Ming Gu
- Shanghai Skin Disease Hospital, Shanghai, China
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