scholarly journals DETERMINATION OF REACTIVE HBsAg CUT-OFF THAT NEED CONFIRMATORY TEST

2018 ◽  
Vol 24 (3) ◽  
pp. 251
Author(s):  
Sherly Purnamawaty ◽  
Irda Handayani ◽  
Asvin Nurulita ◽  
Uleng Bahrun
Keyword(s):  
Hepatitis B ◽  
Roc Curve ◽  
Hepatitis B Surface Antigen ◽  
High Sensitivity ◽  
Confirmatory Test ◽  
Cross Sectional ◽  
Significant Difference ◽  
Method Analysis ◽  
Total Test

Hepatitis B surface antigen (HBsAg) is the earliest and most important serological marker for the diagnosis of HBV infection. The availability of new methods with a high sensitivity to detect HBsAg results in the increase of false reactive results so that a confirmatory test is needed,but this will increase the total test cost. A reactive cut-off value for a confirmatory test is needed to make the use of this test more efficient. This study was a cross-sectional. All the specimens with HBsAg >0.17 Cut-Off Index (COI) were confirmed with HBsAg confirmatory test. HBsAg test used a sandwich ELFA method while HBsAg confirmatory test used an antibody neutralization method. Analysis of the ROC curve obtained HBsAg cut-off value that need confirmatory test. Total samples were 80 with 51 (63.8%) confirmed reactive and 29 (36.2%) non-reactive. There was a statistically significant difference between HBsAg that confirmed reactive (median 2.76 COI) and non-reactive (median 0.32 COI) (p<0.001). ROC curve showed an AUC of 0.805 which meant a good diagnostic performance for HBsAg test based on a confirmatory test. The specificity of 89.66% and sensitivity 64.71% were obtained from the cut-off 1.08 COI and considered the best cut-off. Some possible causes of false reactive results were Hepatitis B vaccine, G-CSF therapy and limitation of the HBsAg methods. HBsAg cut-off with ELFA method that need HBsAg confirmatory test was <1.08 COI. The researchers suggests further studies with different sampling methods so a better data distribution can be obtained.

Determination of Cut-Off Index of Reactive HBsAg Based on Confirmatory Test at Dr. Moewardi Hospital

2021 ◽  
Vol 28 (1) ◽  
pp. 31
Author(s):  
Ellya Latifah Ilyas ◽  
JB. Suparyatmo ◽  
Amiroh Kurniati
Keyword(s):  
Roc Curve ◽  
Specific Binding ◽  
Turnaround Time ◽  
Analytic Study ◽  
Analytical Performance ◽  
Confirmatory Test ◽  
High Price ◽  
Cross Sectional

HBsAg confirmatory test is required to confirm false reactive HBsAg due to non-specific binding of antigen withantibody. HBsAg confirmatory test cannot be performed in every laboratory due to the high price of reagents, short reagentshelf life, prolonged turnaround time, and increasing complexity of the test. This study aimed to determine the HBsAg COI(cut-off unit) cut-off point, which requires a confirmatory HBsAg test on the COBAS e411 analyzer with the ECLIA method.An observational analytic study with a cross-sectional approach was performed on 59 patients who underwent the HBsAgtest at Dr. Moewardi Hospital, Surakarta in September-October 2020 on the Cobas e411 analyzer with the ECLIA method.The best analytical performance of cut-off index of reactive HBsAg was determined using the ROC curve and AUC. Theresults of initial HBsAg COI showed the following results: borderline with a mean: 0.975±0.0014 and reactive with a medianof 4.38 (1.03-10)). The confirmatory test showed 59.8% reactive, 22.2% non-reactive, 13.8% not valid and 4.2%indeterminate results. The cut-off value for reactive HBsAg was 4.34 with an AUC of 0.818 (95% CI: 0.713 - 0.923; p=0.054), asensitivity of 72.1% and a specificity of 87.5%. The initial cut-off of HBsAg index at 4.34 COI showed the best analyticalperformance with a sensitivity of 72.1% and specificity of 87.3%. Therefore, it can be used to determine HBsAg results thatrequire HBsAg confirmatory examination on the Cobas e411 analyzer with the ECLIA method.

Evaluation of Hepatitis-B and Its Markers Among Some Attendees of Two Health Facilities In Port Harcourt, Rivers State, Nigeria

2021 ◽  
Vol 42 (2) ◽  
pp. 403-410
Author(s):  
M.A. Erasmus ◽  
G.N. Wokem
Keyword(s):  
Hepatitis B ◽  
Hepatitis B Surface Antigen ◽  
Demographic Data ◽  
Health Centre ◽  
University Teaching ◽  
Cross Sectional ◽  
Hbv Markers ◽  
Port Harcourt ◽  
Significant Difference ◽  
Rivers State

A cross-sectional investigation of hepatitis-B status among attendees of Modern Primary Health Centre, Eneka and Rivers State University Teaching Hospital, Port Harcourt was evaluated. Seven hundred (700) subjects of different ages of both sexes were included in the study after ethical approval was obtained from the Rivers State Ministry of Health, Port Harcourt. Consent forms were issued to get subjects’ consent before questionnaire administration to obtain their demographic data. The uninfected subjects were used as control. About 4mls of blood was taken from each subject by vein-puncture; 2mls each was dispensed into EDTA and plain bottles for analysis. The samples were used to assay for hepatitis-B surface antigen (HBsAg), hepatitis–B virus (HBV) markers (HBsAb, HBeAg, HBeAb, HBcAb) using standard techniques. The overall prevalence of HBV was 5.1% in Port Harcourt. The males had higher prevalence of 7.9% HBV than the females 3.4% HBV, although there was no statistically significant difference (P ≥0.05). The HBV was highest among subjects of age group 24-29 years (8.29%) and 30-35 years (9.2%) accordingly. The HBV markers results show that while HBsAg occurred among all the subjects that were positive for HBV, HBeAb was completely absent.

Need for Confirmatory Neutralization Tests for Hepatitis B Surface Antigen Tests in Populations with Intermediate Prevalence

2021 ◽  
Author(s):  
Min Young Lee ◽  
So Young Kang ◽  
Woo In Lee ◽  
Myeong Hee Kim
Keyword(s):  
Hepatitis B ◽  
Surface Antigen ◽  
Neutralization Test ◽  
Hepatitis B Surface Antigen ◽  
False Negative ◽  
Confirmatory Test ◽  
Negative Group ◽  
Positive Group ◽  
Test Kit ◽  
Antigen Tests

Abstract Objective Hepatitis B surface antigen (HBsAg) is known as the hallmark of hepatitis B virus (HBV) infection. This study aimed to determine whether an HBsAg neutralization test is necessary to accurately interpret HBsAg test results. Methods Initially reactive HBsAg specimens from a 5-year period, with cutoff index values between 1.0 and 2.0, were subjected to neutralization confirmatory testing using an Elecsys HBsAg Confirmatory test kit (Roche Diagnostics GmbH. Mannheim, Germany). Results The neutralization test showed 46.1% positive (confirmed positive group) and 53.9% negative (confirmed negative group) results from the total specimens. Among the confirmed negative group, 79.5% of patients were confirmed to be negative for the current infection, whereas 4 patients in the chronic hepatitis B subgroup showed a neutralization percentage close to 40%. More than half of patients in the confirmed positive group were considered to be in the hepatitis B e antigen-negative inactive HBsAg carrier phase. Conclusion In populations with intermediate HBV prevalence, a neutralization test is necessary to confirm an HBsAg result and reduce the false positive and false negative rates of initial HBsAg tests.

scholarly journals Cross-sectional association between long working hours and liver function: the Kangbuk Samsung Health Study

BMJ Open ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. e041595
Author(s):  
Eunchan Mun ◽  
Woncheol Lee ◽  
Min-Woo Nam ◽  
Hyun-Il Kim ◽  
Hyeongcheol Kim ◽  
...  
Keyword(s):  
General Population ◽  
Hepatitis B ◽  
Liver Function ◽  
South Korea ◽  
Hepatitis B Surface Antigen ◽  
Working Hours ◽  
Health Study ◽  
Health Examination ◽  
Cross Sectional ◽  
Long Working Hours

ObjectivesAlthough the effects of long working hours on liver function remain unclear, in South Korea, there is a social perception that long working hours are associated with poor liver function. Thus, long working hours have recently become a major issue. This study aimed to determine the association between long working hours and liver function, as indicated by the alanine transaminase (ALT) levels.DesignCross-sectional study.SettingLarge university hospitals in Seoul and Suwon, South Korea.ParticipantsWorkers in formal employment who underwent a comprehensive health examination at the Kangbuk Samsung Hospital Total Healthcare Centre clinics in Seoul and Suwon, South Korea, between January 2011 and December 2018. Of the 386 488 participants, 212 421 met the inclusion criteria and were included in the analysis.Primary outcome measureALT elevation.ResultsThe participants were predominantly well-educated (86.1%), male (69.3%) and in their 30s (49.6%). In total, 13.4% of the participants presented ALT elevation (>40 IU/L). There was no significant association between working hours and ALT elevation in the general population and in the hepatitis B surface antigen (HBsAg)-negative group. Conversely, in the HBsAg-positive group, working >60 hours per week compared with 35–40 hours per week was significantly associated with ALT elevation. The association was more pronounced in those with ALT levels >80 IU/L (OR 1.94, 95% CI 1.24 to 3.01) than in those with ALT levels >40 IU/L (OR: 1.45, 95% CI 1.20 to 1.75). The p values for trend were <0.05.ConclusionsLong working hours were associated with ALT elevation only in hepatitis B virus carriers and not in the general population. Provided that there is adherence to the legal working hours, there is no need to further restrict working hours for liver health, irrespective of HBsAg status.

scholarly journals The Impact of Universal Infant Hepatitis B Immunization on Reducing the Hepatitis B Carrier Rate in Pregnant Women

2018 ◽  
Vol 220 (7) ◽  
pp. 1118-1126 ◽  
Author(s):  
Wei-Ju Su ◽  
Shu-Fong Chen ◽  
Chin-Hui Yang ◽  
Pei-Hung Chuang ◽  
Hsiu-Fang Chang ◽  
...  
Keyword(s):  
Hepatitis B ◽  
Pregnant Women ◽  
Screening Program ◽  
Hepatitis B Surface Antigen ◽  
Carrier Rate ◽  
Cross Sectional ◽  
Hbv Vaccine ◽  
Hbv Vaccination ◽  
The Impact ◽  
Universal Infant

Abstract Background The hepatitis B virus (HBV) status of pregnant women affects HBV vaccine failure in their offspring. This study is aimed to investigate the impact of the universal infant HBV vaccination program on the long-term hepatitis B surface antigen (HBsAg) rate in pregnant women. Methods Using the National Immunization Information System, we examined a 32-year period of cross-sectional data on a maternal HBsAg and hepatitis B e antigen (HBeAg) screening program launched in July 1984. An age-period-cohort model analysis of 940 180 pregnant women screened for July 1996–June 1997 and the years 2001, 2006, 2011, and 2016 was applied. Results The annual HBsAg- and HBeAg-seropositive rates decreased from 13.4% and 6.4%, respectively, for the period 1984–1985 to 5.9% and 1.0% in 2016 (P for both trends < .0001). Pregnant women with birth years after July 1986 (the HBV vaccination cohort) had the lowest relative risk (0.27 [95% confidence interval, .26–.28]) of HBsAg positivity compared with birth years before June 1984. Conclusions The birth cohort effect in relation to the universal infant HBV immunization program has effectively reduced the HBV carrier rate in pregnant women and the burden of perinatal HBV infection on the next generation.

scholarly journals HemoCue against Coulter LH-750 in the estimation of hemoglobin levels of blood donors in mobile collection settings: a comparative study

2018 ◽  
Vol 27 (4) ◽  
pp. 250-5
Author(s):  
Sultan A.M. Saghir ◽  
Amer A. Almaiman ◽  
Aishah K.A. Shatar ◽  
Norris Naim ◽  
Huda S. Baqir
Keyword(s):  
Blood Donors ◽  
Reference Method ◽  
Cross Sectional Study ◽  
Outpatient Setting ◽  
Concordance Correlation ◽  
Cross Sectional ◽  
New Device ◽  
Coefficients Of Variation ◽  
Significant Difference

Background: The fast and outpatient setting for a determination of the hemoglobin (Hb) level is a well-recognized prerequisite to detect anemia in blood donors. This study aimed to evaluate the performance of the HemoCue methods (HemoCue B-Hb and HemoCue-301) against Coulter LH-750 as a reference method for Hb determination.Methods: This study was an experimental cross-sectional study. It includes 455 blood samples that were collected from volunteer blood donors between January 15, 2010 and February 15, 2011. The performance of the three methods and their comparisons were assessed using the analysis of coefficients of variation (CV), linear regression, and mean difference. Correlation coefficient and Bland–Altman plots were drawn to compare the two HemoCue measurements and the automated cell analyzer against each other and to evaluate their results. The Hb concentrations were compared using the concordance correlation coefficient.Results: The findings exhibited that the CV for the three methods Coulter LH-750, HemoCue B-Hb, and HemoCue-301 were 0.60%, 0.72%, and 0.92%, respectively. A statistically significant difference was observed between the means of the Hb measurements for the three methods (p<0.001). The HemoCue B-Hb and HemoCue-301 methods showed the best agreement, and the Coulter LH-750 method gave a lower Hb value compared with the two HemoCue methods. The results showed a positive correlation of HemoCue Hb results compared with the reference method.Conclusion: All three methods provide a good agreement for Hb determination. The new device HemoCue-301 was found to be more accurate compared with HemoCue B-Hb and Coulter LH-750.

scholarly journals ANALYSIS OF PLATELET COUNT ON FIBROSIS DEGREE IN CHRONIC HEPATITIS B PATIENTS

2018 ◽  
Vol 24 (2) ◽  
pp. 165
Author(s):  
Hairul Anwar ◽  
Mutmainnah Mutmainnah ◽  
Ibrahim Abdul Samad
Keyword(s):  
Chronic Hepatitis ◽  
Platelet Count ◽  
Hepatitis B ◽  
Chronic Hepatitis B ◽  
Complete Blood Count ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Significant Difference ◽  
B Virus ◽  
Spearman Correlation Test

Chronic hepatitis B is an infectious liver disease caused by hepatitis B virus that persist for more than 6 months. Fibrosis is a result of fibrogenesis which is the formation of connective tissue (scarring) caused by liver tissue damage. Liver damage will affect the production of thrombopoetin causing disturbances in the balance between destruction and production of platelet resulting in decreased platelet counts. This study was a retrospective cross-sectional study by taking the data from medical records of chronic hepatitis B patients who were tested for complete blood count and fibroScan at the Dr.Wahidin Sudirohusodo Hospital Makassar from January 2014 to July 2016. The result showed a total of 323 chronic B hepatitis patients, 99 with severe fibrosis, 84 with moderate fibrosis and 140 with mild fibrosis. The Spearman correlation test showed a significant correlation between the platelet count and the degree of fibrosis (p <0.001) and showed a positive correlation between both of them with a very strong correlation (r = 0.802). The Kruskal-Wallis test showed a significant difference between platelet count and the degree of fibrosis (p<0.001). The conclusion is that a decreased platelet count is a sign of an increase in the degree of fibrosis in chronic hepatitis B patients. It is suggested to perform another study with larger samples based on the degree of fibrosis. 

scholarly journals High Sensitivity CReactive Protein (hsCRP) Level on Premature Rupture of Membrane (PROM) at Term Pregnancy

2017 ◽  
pp. 12-15
Author(s):  
Meily Manoppo ◽  
Hermie MM Tendean ◽  
Joice MM Sondakh
Keyword(s):  
High Sensitivity ◽  
C Reactive Protein ◽  
Term Pregnancy ◽  
Premature Rupture ◽  
Cross Sectional ◽  
Reactive Protein ◽  
Significant Difference ◽  
Hs Crp ◽  
Cross Sectional Design ◽  
Parametric Statistical Test

Objective: To compare the level of high sensitivity C-Reactive Protein (hs-CRP) on patients with premature rupture of membranes (PROM) at term pregnancy. Methods: The study was cross-sectional design. The data collection included age, parity, gestational age, birth weight, and APGAR score on 28 pregnant women at term pregnancy consisting of 14 subjects of Premature Rupture of Membrane (PROM) less than 12 hours and the remaining one was equal or more than 12 hours. We took blood samples from the subjects for the examination of hs-CRP level. Data were analyzed using non-parametric statistical test and processed using Statistical Package for Social Sciences (SPSS) version 20. Results: The mean hs-CRP level on PROM <12-hour and 12-hour group was 12.9 and 17.8 mg/l. There was not significant difference on hs-CRP level between both of group at term pregnancy (p=0.734). Conclusion: The level of hs-CRP does not have association with the incidence of PROM. [Indones J Obstet Gynecol 2017; 5-1: 12-15] Keywords: high sensitivity C-Reactive Protein, premature ruptures of membranes, term pregnancy

scholarly journals Nurses’ Knowledge toward Hepatitis B and Hepatitis C in Guilan, Iran

2017 ◽  
Vol 11 (1) ◽  
pp. 34-42 ◽  
Author(s):  
Farahnaz Joukar ◽  
Fariborz Mansour-Ghanaei ◽  
Mohammad Reza Naghipour ◽  
Tolou Hasandokht
Keyword(s):  
Hepatitis C ◽  
Hepatitis B ◽  
Knowledge Score ◽  
Cross Sectional Study ◽  
Teaching Hospitals ◽  
High Risk Population ◽  
Continuous Training ◽  
Cross Sectional ◽  
Significant Difference ◽  
Study Participants

Background: Health care workers (HCWs) represent high risk population for viral hepatitis infection. Objectives: This study sought to assess the knowledge of HCWs regarding hepatitis B (HBV) and hepatitis C (HCV) infection. Methods: In a multi-center cross sectional study, all HCWs from eight teaching hospitals were invited to participate in the study and to fill in a self-administered questionnaire. Results: A total of 1008 eligible HCWs have responded to the study. A high proportion of the study participants (55.4% and 52.9%) had unsatisfactory knowledge about HBV and HCV. Mean knowledge score toward HBV was significantly higher among more educated staff, p <0.001 and vaccinated personnel, P=0.02. Majority of responders answered correctly to transmission questions toward HBV and HCV (90% and 80%, respectively). There was statistically significant difference in only transmission domain score between various hospitals (p<0.05). The highest scores were related to surgical hospital. Conclusion: Although more than ninety percent of our participants were educated about HBV and HCV, knowledge about nature of disease, prevention, treatment and vaccine availability was unsatisfactory. Continuous training program toward viral infection is a matter of necessity.

scholarly journals Hepatitis B Virus Infection in Vaccinated Children and Adolescents with HBsAg-positive Parents: Is Routine Vaccination Sufficient?

Health Scope ◽  
2022 ◽  
Vol In Press (In Press) ◽  
Author(s):  
Alireza Bakhshipour ◽  
Manijeh Khalili ◽  
Raheleh Rafaiee
Keyword(s):  
Hepatitis B Virus ◽  
Hepatitis B ◽  
Hepatitis B Surface Antigen ◽  
Public Health Problem ◽  
Exposed Group ◽  
High Rate ◽  
Childhood Vaccination ◽  
Intradermal Vaccination ◽  
Significant Difference ◽  
B Virus

Background: Hepatitis B virus (HBV) is a severe public health problem in Iran. This study was conducted to investigate the intrafamilial transmission of HBV in vaccinated children whose one or both parents were positive for hepatitis B surface antigen (HBsAg). Methods: In a study with retrospective cohort design, 110 exposed cases with HBsAg-positive parent(s) were compared with 110 unexposed controls of the same sex and age groups. The participants were directly asked about demographic characteristics, medical history, and vaccinations. Blood samples were collected and analyzed for HBV infection markers using the ELIZA method. Results: Overall, 1.8% HBsAg (P = 0.15) and 13.6% hepatitis B core antibody (HBcAb) (P < 0.0001) positivity rates were detected in the exposed group. The hepatitis B surface antibody titer (HBsAb) showed that 34.5% of cases and 56.3% of controls had HBsAb levels > 10 IU/L. There was a significant difference in the protective HBsAb level between the two groups (P < 0.0001). There were significant associations between HBsAb level and gender in the exposed group and decreased HBsAb levels and age. Conclusions: The high rate of positive HBcAb and HBsAg and decreasing HBsAb levels with age in this study indicate that routine childhood vaccination programs are inadequate in preventing HBV transmission and vaccine routes changing or further booster vaccination is essential. Effective case finding in vaccinated children with HBsAg-positive parents, intradermal vaccination, and hepatitis B immunoglobulin in newborns with HBsAg-positive fathers are suggested.

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