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Choi R, Park W, Chun G, Lee J, Lee SG, Lee EH. Recent information on test utilization and intraindividual change in anti-glutamic acid decarboxylase antibody in Korea: a retrospective study. BMJ Open Diabetes Res Care 2022; 10:10/3/e002739. [PMID: 35750359 PMCID: PMC9234797 DOI: 10.1136/bmjdrc-2021-002739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 05/24/2022] [Indexed: 11/04/2022] Open
Abstract
INTRODUCTION This study aimed to evaluate the test utilization and intraindividual changes of anti-glutamic acid decarboxylase antibody (GADA), a biomarker for autoimmune diabetes in Korean adults. RESEARCH DESIGN AND METHODS We retrospectively investigated longitudinally measured GADA test results to assess test utilization and intraindividual changes through a laboratory information system. RESULTS During the 3-year study period, 11 668 GADA tests were performed in 11 184 Korean adults. The overall rate of GADA positivity at initial measurement was 7.8%. Among the 11 668 test results, 871 GADA test results from 401 Korean patients (228 men and 173 women) requested by 54 hospitals were analyzed for intraindividual changes. Among these 401 patients, 80 (20.0%) had positive (≥2.0 U/mL) and 35 (8.7%) had gray zone GADA (1.0-1.9 U/mL) level at initial measurement. The prevalence of GADA-positive patients based on initial measurement was significantly different by type of medical institution. Among 80 patients with initial positive results, 5 (6.3%) experienced qualitative GADA changes during follow-up. Among the 321 patients with initially negative or gray zone GADA, 9 (2.8%) changed to GADA positive at least once during follow-up. CONCLUSIONS Although most patients had stable GADA results, some exhibited qualitative changes during follow-up. This study can help to understand the variation in GADA positivity in the monitored patients.
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Affiliation(s)
- Rihwa Choi
- Department of Laboratory Medicine, Green Cross Laboratories, Yongin-si, Republic of Korea
- Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Gangnam-gu, Republic of Korea
| | - Wonseo Park
- Infectious Disease Research Center, Green Cross Laboratories, Yongin-si, Republic of Korea
| | - Gayoung Chun
- Infectious Disease Research Center, Green Cross Laboratories, Yongin-si, Republic of Korea
| | - Jiwon Lee
- Department of Laboratory Medicine, Green Cross Laboratories, Yongin-si, Republic of Korea
| | - Sang Gon Lee
- Department of Laboratory Medicine, Green Cross Laboratories, Yongin-si, Republic of Korea
| | - Eun Hee Lee
- Green Cross Laboratories, Yongin-si, Republic of Korea
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Maity SN, Poonati R, Punati RD, Mallepaddi P, Marothi Y, Mallepaddi PC. Development of sensitive and specific loop-mediated isothermal amplification combined with lateral flow device for the rapid detection of hepatitis B virus infection. Braz J Microbiol 2022; 53:615-623. [PMID: 35178681 PMCID: PMC9151950 DOI: 10.1007/s42770-022-00690-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 01/28/2022] [Indexed: 02/01/2023] Open
Abstract
Hepatitis B virus is a highly infectious blood borne microbial pathogen that causes several hepatic complications like liver cirrhosis and hepatocellular carcinoma. Several methods are available for the detection of HBV, but every method has their own merits and demerits, which restrict their use in clinical laboratories. The aim of this present study is the development of rapid, inexpensive, sensitive, and specific loop-mediated isothermal amplification followed by lateral flow device (LFD) for detection of HBV in blood specimens. METHODS HBV standard plasma panels and donor plasma specimens were used to evaluate the assay. HBV DNA was extracted by using QiAamp DNA Blood Mini Kit. Amplification was carried out at constant temperature 63 °C for 60 min. LAMP end products were analyzed by using ESE LAMP tube scanner, gel electrophoresis, UV-lamp, and lateral flow device. RESULTS HBV-LAMP-LFD assay revealed sensitivity of 92% (138/150) of HBV positive plasma specimens. Specificity of HBV-LAMP-LFD was calculated 100%. CONCLUSION Our study concludes that HBV-LAMP-LFD is rapid, easy to use, sensitive, and specific point-of-care diagnostic assay for the detection of hepatitis B virus in blood samples. This assay can be used in resource-limited settings as well as in HBV endemic areas.
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Affiliation(s)
- Soumendra Nath Maity
- Department of Microbiology, RDGMC, Ujjain, Madhya Pradesh, India.
- Department of Clinical Research Laboratory, Genomix Molecular Diagnostics Pvt. Ltd, Hyderabad, India.
| | - Revathi Poonati
- Department of Medical Microbiology, GenomixCARL Pvt.Ltd, Pulivendula, Andhra Pradesh, India
| | - Rudrama Devi Punati
- Department of Clinical Research Laboratory, Genomix Molecular Diagnostics Pvt. Ltd, Hyderabad, India
| | - Pratyusha Mallepaddi
- Department of Clinical Research Laboratory, Genomix Molecular Diagnostics Pvt. Ltd, Hyderabad, India
| | - Yogyata Marothi
- Department of Microbiology, RDGMC, Ujjain, Madhya Pradesh, India
| | - Prudhvi Chand Mallepaddi
- Department of Clinical Research Laboratory, Genomix Molecular Diagnostics Pvt. Ltd, Hyderabad, India
- Department of Medical Microbiology, GenomixCARL Pvt.Ltd, Pulivendula, Andhra Pradesh, India
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Chen CM, Ouyang S, Lin LY, Wu LJ, Xie TA, Chen JJ, Li ZX, Zhu GD, Ji TX, Pan ZY, Xia Y, Guo XG. Diagnostic accuracy of LAMP assay for HBV infection. J Clin Lab Anal 2020; 34:e23281. [PMID: 32157743 PMCID: PMC7370716 DOI: 10.1002/jcla.23281] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 02/13/2020] [Accepted: 02/18/2020] [Indexed: 12/13/2022] Open
Abstract
Background Detection of hepatitis B virus (HBV) is vital for the diagnosis of hepatitis B infection. A novel test loop‐mediated isothermal amplification (LAMP) has been successfully applied to detect various pathogens. However, the accuracy of LAMP in diagnosing HBV remains unclear. Therefore, in the present study, the accuracy of LAMP for HBV detection was evaluated systematically. Methods Embase, Cochrane Library, and PubMed databases were searched for studies using LAMP to detect HBV. Then, two researchers extracted data and assessed the quality of literature using the QUADAS‐2 tool independently. I2 statistic and chi‐square test were analyzed to investigate the heterogeneity, and Deek's funnel plot assessed the publication bias. The pooled sensitivity (SEN), specificity (SPE), positive LR (PLR), negative LR (NLR), diagnostic odds ratio (DOR), and 95% confidence intervals were displayed in forest plots. We calculated the area under the curve (AUC) to assess the overall efficiency of LAMP for HBV detection. Results A total of nine studies with 1298 samples were finally included in this evaluation. The pooled sensitivity and specificity of HBV detection were 0.91 (95% CI: 0.89 ~ 0.92) and 0.97 (95% CI: 0.94 ~ 0.99), respectively. The PLR, NLR, and DOR were 16.93 (95% CI: 6.15 ~ 46.55), 0.08 (95% CI: 0.05 ~ 0.14), and 397.57 (95% CI: 145.41 ~ 1087.07). Besides, the AUC was 0.9872, and Deek's plot suggested that there existed publication bias in the studies. Conclusion Compared with PCR, LAMP is a simple, rapid, and effective assay to diagnose HBV. However, additional evidence is essential to confirm that LAMP can replace other methods in diagnosing HBV infection.
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Affiliation(s)
- Chu-Mao Chen
- Department of Clinical Laboratory Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Shi Ouyang
- Department of Infectious Disease, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Li-Ying Lin
- Department of Clinical Laboratory Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Clinical Medicine, The Third Clinical School of Guangzhou Medical University, Guangzhou, China
| | - Li-Juan Wu
- Baoan Maternal and Child Health Hospital, Jinan University, Shenzhen, China
| | - Tian-Ao Xie
- Department of Clinical Laboratory Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Clinical Medicine, The Third Clinical School of Guangzhou Medical University, Guangzhou, China
| | - Juan-Jiang Chen
- Department of Clinical Laboratory Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Zhen-Xing Li
- Department of Respiratory Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Guo-Dong Zhu
- Department of Geriatrics, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, China
| | - Tian-Xing Ji
- Department of Clinical Medicine, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Zhi-Yong Pan
- Department of Clinical Laboratory Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Clinical Medicine, The Third Clinical School of Guangzhou Medical University, Guangzhou, China
| | - Yong Xia
- Department of Clinical Laboratory Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Clinical Medicine, The Third Clinical School of Guangzhou Medical University, Guangzhou, China
| | - Xu-Guang Guo
- Department of Clinical Laboratory Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Clinical Medicine, The Third Clinical School of Guangzhou Medical University, Guangzhou, China.,Key Laboratory for Major Obstetric Diseases of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
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Choi R, Oh Y, Park S, Lee SG, Lee EH. Understanding the patient population and test utilization for hepatitis B virus testing. J Clin Lab Anal 2019; 33:e22987. [PMID: 31568619 PMCID: PMC6868419 DOI: 10.1002/jcla.22987] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 06/10/2019] [Accepted: 07/04/2019] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Hepatitis B virus (HBV) infection remains a global concern with different epidemiologies due to several factors including migration, vaccination policies, and new antiviral treatment regimens. It is important to understand the characteristics of a patient population, including the prevalence of diseases, and to assess test utilization to understand and evaluate the clinical performance of laboratory tests and to improve the quality of clinical laboratories. MATERIALS AND METHODS In this study, we evaluated serologic and virologic laboratory tests including hepatitis B surface antigen, hepatitis B surface antibody, hepatitis B envelope antigen (HBeAg), hepatitis B envelope antibody, and HBV DNA in Korean adults who were exposed to HBV. RESULTS During the 1-year study period, we obtained 22 750 specimens from 17 523 adult Korean patients (>18.0 years; 9894 males and 7629 females) with a median age of 50.1 years (interquartile range, 42.2-58.2 years). Among them, five serologic and virologic laboratory tests were performed for 1340 (5.9%) specimens from 1172 adult Korean patients (>18.0 years; 647 males and 525 females) with a median age of 46.8 years (range, 19.0-84.5 years). The prevalence of serologic and virologic tests indicating several clinical situations was evaluated. The correlation coefficient between HBV DNA and HBeAg was ρ = 0.85 (P < .0001). However, 51.9% (695/1340) of samples did not show agreement between the two test results. CONCLUSIONS Analysis of the prevalence of patients categorized into five serologic and virologic laboratory results would be helpful to expand our knowledge about patient population characteristics and to improve test utilization.
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Affiliation(s)
- Rihwa Choi
- Department of Laboratory Medicine, Green Cross Laboratories, Gyeonggi-do, Korea.,Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Yejin Oh
- Department of Laboratory Medicine, Green Cross Laboratories, Gyeonggi-do, Korea
| | - Seungman Park
- Department of Laboratory Medicine, Green Cross Laboratories, Gyeonggi-do, Korea
| | - Sang Gon Lee
- Department of Laboratory Medicine, Green Cross Laboratories, Gyeonggi-do, Korea
| | - Eun Hee Lee
- Department of Laboratory Medicine, Green Cross Laboratories, Gyeonggi-do, Korea
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