scholarly journals Validation of OraQuick HCV Rapid Antibody Test in Postmortem Specimens

2020 ◽  
Vol 10 (2) ◽  
pp. 81-86
Author(s):  
Claire E. Rose ◽  
Lisa Duncan ◽  
Amy M. Hawes
Keyword(s):  
Hepatitis C ◽  
Gold Standard ◽  
Rapid Test ◽  
Antibody Test ◽  
Acquisition Time ◽  
Hepatitis C Infection ◽  
Postmortem Blood ◽  
Gold Standard Reference ◽  
Antibody Positivity ◽  
Rapid Antibody

INTRODUCTION: The objective of this study is to evaluate the performance of OraQuick HCV Rapid Antibody Test against a “gold-standard”, FDA-approved, laboratory-based serum immunoassay (SI) in postmortem blood. To date, OraQuick HCV Rapid Antibody Test has not been evaluated for use in postmortem testing. This OraQuick test is a manually performed, visually interpreted, single use immunoassay for the qualitative detection of antibodies to the hepatitis C virus (HCV). METHODS: Blood was collected from 51 decedents whose deaths were investigated in the jurisdiction of the Knox and Anderson County Medical Examiner’s Office (MEO) January 2017 through April 2017. For each consented case, blood was tested using both the OraQuick HCV Rapid Antibody Test and a laboratory-based hepatitis C serum immunoassay (“gold standard” reference assay). Results from the OraQuick HCV Rapid Antibody Test were compared against a laboratory-based hepatitis C serum immunoassay. RESULTS: Using the laboratory-based serum immunoassay (SI) as the “gold standard” for assessing true HCV antibody positivity, and comparing SI against OraQuick rapid test, sensitivity for the OraQuick rapid test was 95.65% and specificity was 96.15% in postmortem blood. DISCUSSION: Our results demonstrate that OraQuick HCV rapid antibody test is reliable for diagnosis of hepatitis C infection in postmortem blood with a relatively short (less than approximately 21.5 hours) postmortem sample acquisition time. The OraQuick in some cases may be superior to traditional, laboratory-based HCV SI due to potential increased viscosity of postmortem blood.

DETEKSI ANTIBODI MULTIPEL HEPATITIS C DALAM DARAH DONOR

2016 ◽  
Vol 21 (3) ◽  
pp. 261
Author(s):  
Ranti Permatasari ◽  
Aryati Aryati ◽  
Budi Arifah
Keyword(s):  
Hepatitis C ◽  
Predictive Value ◽  
Core Protein ◽  
Rapid Test ◽  
Antibody Test ◽  
Diagnostic Value ◽  
Hcv Infection ◽  
Antibody Detection ◽  
Hcv Rna ◽  
Hcv Antibody

Hepatitis C (HCV) infection could be spread by blood transfusion. Screening of HCV in donor blood could prevent HCV infection to the recipient. HCV antibody test using rapid test of multiple antibody detection by immunochromatography method is an easy and rapid test that could detect four HCV antibodies separately. The aim of this study was to evaluate the diagnostic value of antibody HCV using multiple antibody detection rapid test in diagnosing HCV infection. This was an analytical observational study with a cross sectional design. The samples consisted of 42 donors’ blood serum from the Surabaya Branch of the Indonesian Red Cross which underwent HCV infection test using ELISA method. The samples were then tested using PCR HCV RNA as the gold standard and antibody HCV multiple antibodydetection rapid test The diagnostic value of HCV antibody test using multiple antibody detection rapid test by immunochromatography method showed a diagnostic sensitivity of 100%, diagnostic specificity of 75%, positive predictive value of 66.7% and negative predictive value of 100%, a diagnostic efficiency of 83.3%, with a positive probability ratio of 4 times. The most often positive antibody pattern was four (4) positive antibodies (core protein, NS3, NS4 and NS5). Core protein (CP) and NS3 were the most often positive antibodies. Based on this study result, the HCV antibody test using multiple antibody detection rapid test by immunochromatography method has a good diagnostic value.

scholarly journals Performance of the OraQuick HCV Rapid Antibody Test for Screening Exposed Patients in a Hepatitis C Outbreak Investigation

2014 ◽  
Vol 52 (7) ◽  
pp. 2650-2652 ◽  
Author(s):  
F. Gao ◽  
E. A. Talbot ◽  
C. H. Loring ◽  
J. J. Power ◽  
J. Dionne-Odom ◽  
...  
Keyword(s):  
Hepatitis C ◽  
Antibody Test ◽  
Outbreak Investigation ◽  
Rapid Antibody

scholarly journals Performance Evaluation of the OraQuick Hepatitis C Virus Rapid Antibody Test

2013 ◽  
Vol 33 (3) ◽  
pp. 184-189 ◽  
Author(s):  
Young Joo Cha ◽  
Quehn Park ◽  
Eun-Suk Kang ◽  
Byung Chul Yoo ◽  
Kyoung Un Park ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Antibody Test ◽  
Rapid Antibody

scholarly journals Validation of rapid antibody (IgG-IgM) test kit for SARS COV-2 infection in Qatar

2021 ◽  
Author(s):  
Jesha Mundodan ◽  
Samina Hasnain ◽  
Hayat Khogali ◽  
Soha Shawqi Al Bayat ◽  
Dina Ali ◽  
...  
Keyword(s):  
Predictive Value ◽  
Local Population ◽  
Rapid Test ◽  
Antibody Test ◽  
Molecular Testing ◽  
Rt Pcr ◽  
Test Kit ◽  
Asymptomatic Individuals ◽  
Sensitivity Specificity ◽  
Rapid Antibody

Background: In response to the growing coronavirus disease 2019 (COVID-19) pandemic and the shortage of laboratory based molecular testing capacity and reagents, multiple diagnostic test manufacturers have developed rapid and easy to use devices to facilitate testing outside laboratory settings. These kits are either based on detection of proteins from SARS-CoV-2 virus or detection of antigen or human antibodies generated in response to the infection. However, it is important to understand their performance characteristics and they must be validated in the local population setting.Design and Methods: The objective is to assess the validity of the rapid test for IgG and IgM immunoglobulins compared to the current gold standard reverse transcription polymerase chain reaction (RT-PCR) test. A total of 16951 asymptomatic individuals were tested by the Ministry of Public Health track-and-trace team using both rapid immunodiagnostic test and RT-PCR as part of screening across various random settings with potential risk of community interaction prior to gradual lifting of restrictions in Qatar.  Rapid test was considered to be posiive if both IgG and IgM are positive, while only IgG/IgM positive was considered as rapid test negative. Sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) were calculated.Results: The sensitivity of rapid test kit was found to be 0.9%, whereas the specificity was found to be 97.8%. the PPV was found to be 0.3% whereas the NPV was found to be 99.4%.Conclusion: Based on the outcome and results of the study, it appears that the sensitivity and PPV of the rapid antibody test are low. As such, this test is not recommended for use to assist in taking clinic-based decisions or decisions related to quarantine/isolation.

scholarly journals Evaluation of a Rapid Immunochromatographic test kit to the Gold Standard Fluorescent Antibody test for diagnosis of rabies in animals in Bhutan

2019 ◽  
Author(s):  
Tenzin Tenzin ◽  
Kelzang Lhamo ◽  
Purna B Rai ◽  
Dawa Tshering ◽  
Pema Gyamtsho ◽  
...  
Keyword(s):  
Gold Standard ◽  
Fluorescent Antibody ◽  
False Negative ◽  
Rapid Test ◽  
Antibody Test ◽  
Perfect Agreement ◽  
Tissue Samples ◽  
Test Kit ◽  
Resource Poor ◽  
Test Result

Abstract Background: Rabies kills approximately 59,000 people in the world each year worldwide. Rapid and accurate diagnosis of rabies is important for instituting rapid containment measures and for advising the exposed people for postexposure treatment. The application of a rapid diagnostic tests in the field can greatly enhance disease surveillance activities, especially in resource poor settings.Methods: From 2012 to 2017, a total of 179 brain tissue samples collected from different animal species (113 dogs, 50 cattle, 10 cats, 3 goats, 2 horses, and 1 bear) suspected of having died due to rabies were selected and tested using the rapid immunochromatographic kit from BioNote© company and compared to the Gold Standard Fluorescent Antibody test (FAT) for diagnosis of rabies.Results: Among 179 samples examined in this study, there was concordance in results by the rapid test and FAT in 115 positive samples and 54 negative samples. Test result were discordant in 10 samples which were positive by FAT, but negative (false negative) by rapid kit. The rapid test kit showed a sensitivity of 92% (95% CI: 85.9 – 95.6) and specificity of 100% (95% CI: 93.4 – 100) using FAT as the gold standard. The positive and negative predicative values were found to be 100% (95% CI:96.7 – 100) and 84% (95% CI: 73.6 – 91.3), respectively. Overall there was 94.41% (95% CI: 90 – 96.9) test agreement (almost perfect agreement) between rapid test and FAT (Kappa value = 0.874).Conclusions: Our results demonstrate the potential value of the rapid test kit for countries with limited diagnostic resources, including Bhutan. The rapid kit’s inability to correctly detect 10 FAT-positive samples (10 out of 179 (5.6%) were false negatives) in our study could have been due to the low viral load in the samples (< 102.0LD50/0.03ml) which could not be detected by the rapid kit as compared with the FAT. The human factor related to the varying experiences of the technicians who performed the test in the field also may have influenced the test result. The rapid test kit is inexpensive, rapid and easy to use in the field or in laboratory setting without the need for special training and can support to enhance rabies surveillance in resource poor countries.

Hemodialysis access surgery – Is there an increased risk of acquiring hepatitis C virus compared to other elective vascular interventions?

VASA ◽  
2008 ◽  
Vol 37 (1) ◽  
pp. 81-85
Author(s):  
Assadian ◽  
Assadian ◽  
Holak ◽  
Watkins-Riedel ◽  
Senekowitsch ◽  
...  
Keyword(s):  
Hepatitis C ◽  
Antibody Test ◽  
Elisa Test ◽  
Chronic Hemodialysis ◽  
Surgical Patients ◽  
Hcv Rna ◽  
Hemodialysis Access ◽  
Hepatitis C Infection ◽  
Surgical Interventions ◽  
Increased Risk

To evaluate whether dedicated access surgeons might have a significantly higher risk of acquiring hepatitis C infection compared to other vascular surgeons by assessing the prevalence of hepatitis C patients who are on chronic hemodialysis and to compare the frequency to patients undergoing elective vascular interventions. Patients and methods: A retrospective chart and data analysis of all patients on chronic hemodialysis was conducted. As a comparative group, the prevalence of anti-HCV antibodies and positive HCV RNA PCR among patients admitted for elective vascular surgery was assessed. Results: Of 285 patients on chronic hemodialysis, 202 (71%) were had both tests (antibody test for HCV and specific HCV RNA PCR testing). 5% (n = 11; CI95 = 3–10%) were antibody positive, and 4% (n = 8; CI95 = 2–8%) were also PCR positive and therefore infectious. One patient was acutely infected. Of 4963 vascular surgical patients, 1141 (23%) had an anti-HCV antibody ELISA test and specific HCV RNA PCR testing. 0.4% (n = 4; CI95 = 0.1–1%) were antibody positive and 0.2% (n = 2; CI95 = 0.03–0.7%) were also PCR positive and hence infectious. No acutely infected patient was detected in this population. The chance of operating on a HCV positive and infectious patient among hemodialysis patients was almost 27 times higher than among elective vascular surgical patients (P < 0.0001; OR = 26.56; CI95 = 5.42–253.40). Conclusions: Dedicated hemodialysis access surgeons have a higher risk to acquire hepatitis C infection compared to vascular surgeons performing all other elective vascular surgical interventions. To identify early infected surgeons operating on high risk HCV patient collectives and to start rapid treatment, PCR testing at regular intervals would be advisable.

scholarly journals Prevalence and risk factors for hepatitis C virus in Beta thalassemic patients attending blood diseases center in Ibn- AL -Baladi Hospital, Baghdad

2018 ◽  
Vol 14 (1) ◽  
pp. 42-49
Author(s):  
Zena Hussain Ali
Keyword(s):  
Risk Factors ◽  
Hepatitis C ◽  
Genetic Disorders ◽  
Antibody Test ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Hepatitis C Infection ◽  
Cross Sectional ◽  
Blood Diseases ◽  
Reduced Rate

Background: Thalassemias are a group of heterogeneous genetic disorders, in which the rate of production of hemoglobin is partially or completely suppressed due to reduced rate of synthesis of α or β- chain Objectives: to estimate the prevalence of Hepatitis C infection among B thalassemia patients attending Ibn-AL-Baladi center of blood diseases in AL-Sader city, in AL-Resafa Quarter of Baghdad and to determine the possible risk factors. Type of the study: Cross- sectional study. Methods: A cross sectional study conducted on B Thalassemia patients attending the blood diseases center in Ibn-AL-Baladi hospital during the period from 1st  of July till the 31st  of December 2015.           Results:   All of 400 eligible patients, who were recruited to be included in this study, were accepted to participate in the study giving an overall response rate 100%. The prevalence rate of Hepatitis C according to anti HCV antibody test among the study group was 26%. Conclusions: we conclude that about quarter of Iraqi thalassemic patients visiting the thalassemia center in Ibn-AL-Baladi hospital have HCV infection

scholarly journals Perbandingan Metode RT-PCR dan Tes Rapid Antibodi untuk Deteksi COVID-19

2020 ◽  
Vol 6 (Khusus) ◽  
pp. 47
Author(s):  
Anita Suswanti Agustina ◽  
Rizana Fajrunni'mah
Keyword(s):  
Rapid Test ◽  
Antibody Test ◽  
Rt Pcr ◽  
Literature Study ◽  
Antibody Testing ◽  
Advantages And Disadvantages ◽  
Pcr Method ◽  
Risk Of Exposure ◽  
Antibody Tests ◽  
Rapid Antibody

COVID-19 is caused by SARS-CoV-2, which can spread rapidly from human to human. There are several laboratory tests to detect COVID-19, including the Reverse Transcription-Polymerase Chain Reaction (RT-PCR) method and a rapid test antibody test to detect antibody reactions to SARS-CoV-2. Both methods have advantages and disadvantages of each, while the literature study comparing the two methods is currently limited. The type of research used is library research. Research materials have been collected from various journals, books, and guidelines, in line with the research topic, to obtain 24 library sources. The results of the literature study indicate that the target genes that can be used to detect COVID-19 RT-PCR methods include the N, E, RdRp, and ORF1a/b genes. The sensitivity of rapid antibody tests is known to range from 68−89%, while the specificity of rapid antibody tests ranges from 91−100%. RT-PCR has the advantage of being able to detect low-concentration antigens, but RT-PCR has weaknesses such as requiring expensive equipment and inspection fees, specially trained laboratory personnel, long working time, and high risk of exposure. Rapid antibody testing has advantages, including ease of sampling, lower testing costs, reduced risk of exposure to officers, does not require special equipment and space, but has the potential for cross-reactivity with other coronaviruses. Both the RT-PCR method and the rapid antibody test have their advantages and disadvantages, but rapid antibody testing with RT-PCR can improve the diagnosis of COVID-19. The results of this literature study are expected to be continued as a basis for further research on RT-PCR examination and antibody rapid test for COVID-19 detection in Indonesia, accompanied by information on onset time and time-testing with a large sample of research.

scholarly journals Successful Integration of Hepatitis C Virus Point-of-Care Tests into the Denver Metro Health Clinic

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
A. Jewett ◽  
A. A. Al-Tayyib ◽  
L. Ginnett ◽  
B. D. Smith
Keyword(s):  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Point Of Care ◽  
Linkage To Care ◽  
Antibody Test ◽  
Care Program ◽  
Ease Of Use ◽  
Return Of Results ◽  
Health Clinic ◽  
Hepatitis C Infection

Background. The Centers for Disease Control and Prevention (CDC) recommends testing and linkage to care for persons most likely infected with hepatitis C virus (HCV), including persons with human immunodeficiency virus. We explored facilitators and barriers to integrating HCV point-of-care (POC) testing into standard operations at an urban STD clinic.Methods. The OraQuick HCV rapid antibody test was integrated at the Denver Metro Health Clinic (DMHC). All clients with at least one risk factor were offered the POC test. Research staff conducted interviews with clients (three HCV positive and nine HCV negative). Focus groups were conducted with triage staff, providers, and linkage-to-care counselors.Results. Clients were pleased with the ease of use and rapid return of results from the HCV POC test. Integrating the test into this setting required more time but was not overly burdensome. While counseling messages were clear to staff, clients retained little knowledge of hepatitis C infection or factors related to risk. Barriers to integrating the HCV POC test into clinic operations were loss to follow-up and access to care.Conclusion. DMHC successfully integrated HCV POC testing and piloted a HCV linkage-to-care program. Providing testing opportunities at STD clinics could increase identification of persons with HCV infection.

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