scholarly journals Hepatitis B vaccination status and vaccine immune response among children in rural Senegal

2019 ◽  
Vol 29 (Supplement_4) ◽  
Author(s):  
L Perieres ◽  
M Coste ◽  
S Ndiour ◽  
P Halfon ◽  
C Sokhna ◽  
...  
Keyword(s):  
Immune Response ◽  
Hepatitis B ◽  
Chronic Infection ◽  
Vaccination Status ◽  
Hbv Infection ◽  
Hepatitis B Vaccination ◽  
Chronic Hbv Infection ◽  
Hbv Vaccination ◽  
Chronic Hbv ◽  
Vaccine Immunity

Abstract Background Hepatitis B vaccination during childhood is key to reduce the prevalence of Hepatitis B virus (HBV) infection. In Senegal, a highly endemic country, the three-dose hepatitis B vaccine and the birth dose vaccine were introduced in the Expanded Programme on Immunization (EPI) in 2004 and 2016 respectively. This study aimed to determine chronic HBV infection prevalence, hepatitis B vaccination status and vaccine immunity among children in Senegal. Methods A cross-sectional study including HBV screening was conducted at home among children aged 6 months to 15 years (i.e. born after the introduction of the HBV vaccine in the EPI) in the rural zone of Niakhar. Dried Blood Spot (DBS) samples were collected for the detection of HBsAg, anti-HBc Ab and anti-HBs Ab using chemoluminescence. Vaccination status was assessed using information on vaccination cards. Detectable vaccine immunity was defined with an adjusted DBS threshold of DOI≥0.36 IU/mL (corresponding to 10 IU/mL in venous blood sampling). Results Between October and December 2018, 455 children were enrolled. Preliminary results show that 7/455 (1.5%) had been in contact with HBV (positive anti-HBc Ab) and 5/455 (1.1%) had chronic HBV infection (positive HBsAg). Only 161/455 (35.4%) children had a vaccination card available. Among those, 150/161 (93.2%) received at least 3 doses of hepatitis B vaccine, of which 83/150 (55.3%) had detectable vaccine immunity. The proportion of children with detectable vaccine immunity was significantly higher in children <5 years than in children aged 5-9 and 10-15 (72.3% versus 47.3%, p = 0.006 and 72.3% versus 14.3%, p < 0.001). Conclusions Preliminary results suggest a low prevalence of HBV chronic infection among children born after the introduction of HBV vaccination in Senegal. However, detectable vaccine immunity rapidly decreases with age among vaccinated children, signalling a need for further studies on the immune response to HBV vaccination in this context. Key messages HBV chronic infection is low among children born after the introduction of HBV vaccination in Senegal. Further studies on the immune response to HBV vaccination in this context are needed.

Recombinant hepatitis B core antigen carrying preS1 epitopes induce immune response against chronic HBV infection

Vaccine ◽  
2004 ◽  
Vol 22 (3-4) ◽  
pp. 439-446 ◽  
Author(s):  
Xinchun Chen ◽  
Meizhong Li ◽  
Xiaohua Le ◽  
Weimin Ma ◽  
Boping Zhou
Keyword(s):  
Immune Response ◽  
Hepatitis B ◽  
Hbv Infection ◽  
Core Antigen ◽  
Recombinant Hepatitis ◽  
Chronic Hbv Infection ◽  
Chronic Hbv ◽  
Hepatitis B Core Antigen

Characterization of the immune response to the hepatitis B virus X protein in acute and chronic HBV infection

1989 ◽  
Vol 9 ◽  
pp. S182
Author(s):  
M. Levrero ◽  
A. Franco ◽  
E. De Marzio ◽  
C. Balsano ◽  
M.L. Avantaggiati ◽  
...  
Keyword(s):  
Immune Response ◽  
Hepatitis B Virus ◽  
Hepatitis B ◽  
Hbv Infection ◽  
X Protein ◽  
Chronic Hbv Infection ◽  
B Virus ◽  
Chronic Hbv

Increased risk of developing chronic HBV infection in infants born to chronically HBV infected mothers as a result of delayed second dose of hepatitis B vaccination

Vaccine ◽  
2009 ◽  
Vol 27 (44) ◽  
pp. 6110-6115 ◽  
Author(s):  
Piyanit Tharmaphornpilas ◽  
Aim-orn Rasdjarmrearnsook ◽  
Saowanee Plianpanich ◽  
Pattaratida Sa-nguanmoo ◽  
Yong Poovorawan
Keyword(s):  
Hepatitis B ◽  
Hbv Infection ◽  
Hepatitis B Vaccination ◽  
Chronic Hbv Infection ◽  
Increased Risk ◽  
Chronic Hbv

scholarly journals Plasmacytoid dendritic cells and their role in the immunopathogenesis of viral infections for example hepatitis B

2019 ◽  
Vol 11 (2) ◽  
pp. 14-19 ◽  
Author(s):  
R. R. Khodzhibekov ◽  
O. N. Khokhlova ◽  
A. R. Reizis ◽  
G. M. Kozhevnikova
Keyword(s):  
Immune Response ◽  
Dendritic Cells ◽  
Hepatitis B Virus ◽  
Hepatitis B ◽  
Hbv Infection ◽  
Unique Type ◽  
Antiviral Immune Response ◽  
Chronic Hbv Infection ◽  
B Virus ◽  
Chronic Hbv

A new approach in understanding the mechanisms of immune response in viral hepatitis is the discovery of a unique type of immune cells – plasmocytoid dendritic cells (pDCs). Plasmocytoid dendritic cells (pDCs) are cells of lymphoid origin and morphologically resemble plasma cells. Functionally, they are professional IFN-a-producing cells that play an important role in antiviral immune response. Data on the mechanisms of PDCs participation in hepatitis B virus infection are few and contradictory. In chronic HBV infection, the role of pDCs remains mysterious and poorly understood with conflicting circulating blood pDCs results that show differently that they are not affected or reduced. However, functional disorders of pDCs were observed in patients with chronic HBV infection. The establishment of these mechanisms, as well as the search for the cause of hepatitis B virus latency and the formation of chronic infection remains one of the important and promising areas of scientific activities today.

scholarly journals The Multiple Functions of B Cells in Chronic HBV Infection

2020 ◽  
Vol 11 ◽  
Author(s):  
Ying Cai ◽  
Wenwei Yin
Keyword(s):  
Immune Response ◽  
Chronic Hepatitis ◽  
B Cells ◽  
Hepatitis B ◽  
B Cell ◽  
Hbv Infection ◽  
Chronic Hbv Infection ◽  
Multiple Functions ◽  
Chronic Hbv ◽  
B Cell Subsets

Chronic hepatitis B virus (HBV) infection is one of the main causes of liver diseases, of which the natural history and clinical outcomes are associated with the role of B cells. As humoral immune cells, B cells play a critical role in the process of anti-HBV antibody production. In addition, some studies have also characterized other B cell subsets involved in antigen presentation and regulating the immune response beyond antibody secretion. However, not all B cell subsets play a positive role in the immune response to chronic HBV infection, and various B cell subsets jointly mediate persistent HBV infection, tolerance, and liver damage. Thus, we further sought to elucidate the multiple functions of B cells to gain novel insight into the understanding of chronic hepatitis B (CHB) pathogenesis. We also reviewed the current immunotherapies targeting B cells to explore novel therapeutic interventions for the treatment of chronic HBV infection.

Hepatitis B Virus

2021 ◽  
Author(s):  
Ming V. Lin ◽  
April Wall
Keyword(s):  
Hepatocellular Carcinoma ◽  
Hepatitis B Virus ◽  
Hepatitis B ◽  
Chronic Infection ◽  
Treatment Options ◽  
Hbv Infection ◽  
Chronic Hbv Infection ◽  
Chronic Hepatitis B Virus ◽  
B Virus ◽  
Chronic Hbv

Chronic hepatitis B virus (HBV) infection is a major health burden worldwide, with approximately 257 million people with chronic infection. HBV is a small partially double-stranded DNA virus that replicates within the nucleus of the hepatocyte and commonly leads to chronic infection. Chronic HBV infection can cause cirrhosis, hepatocellular carcinoma, and extrahepatic manifestations such as glomerulonephritis or vasculitis. The latter is due to deposition of circulating immune complex in the different tissues. The natural history of HBV infection can be conceptualized as a spectrum encompassing different phases, including immune tolerance, immune clearance, inactive carrier, and reactivation and resolution. The diagnosis of the different phases of chronic HBV infection relies on various HBV serologies, liver enzyme levels, and histology findings. There are currently eight therapies approved for the treatment of HBV. Tenofovir alafenamide was the most recently approved therapy with a better side effect profile compared with tenofovir disoproxil fumarate. With the recent advances in the basic research in hepatitis B, new treatment options may become available in the near-future. This review contains 9 figures, 11 tables and 80 references Key words: cirrhosis, entecavir, Hepadnaviridae, hepatitis B virus, hepatocellular carcinoma, precore mutation, tenofovir

Hepatitis B Virus

2021 ◽  
Author(s):  
Ming V. Lin ◽  
April Wall
Keyword(s):  
Hepatocellular Carcinoma ◽  
Hepatitis B Virus ◽  
Hepatitis B ◽  
Chronic Infection ◽  
Treatment Options ◽  
Hbv Infection ◽  
Chronic Hbv Infection ◽  
Chronic Hepatitis B Virus ◽  
B Virus ◽  
Chronic Hbv

Chronic hepatitis B virus (HBV) infection is a major health burden worldwide, with approximately 257 million people with chronic infection. HBV is a small partially double-stranded DNA virus that replicates within the nucleus of the hepatocyte and commonly leads to chronic infection. Chronic HBV infection can cause cirrhosis, hepatocellular carcinoma, and extrahepatic manifestations such as glomerulonephritis or vasculitis. The latter is due to deposition of circulating immune complex in the different tissues. The natural history of HBV infection can be conceptualized as a spectrum encompassing different phases, including immune tolerance, immune clearance, inactive carrier, and reactivation and resolution. The diagnosis of the different phases of chronic HBV infection relies on various HBV serologies, liver enzyme levels, and histology findings. There are currently eight therapies approved for the treatment of HBV. Tenofovir alafenamide was the most recently approved therapy with a better side effect profile compared with tenofovir disoproxil fumarate. With the recent advances in the basic research in hepatitis B, new treatment options may become available in the near-future. This review contains 9 figures, 11 tables and 80 references Key words: cirrhosis, entecavir, Hepadnaviridae, hepatitis B virus, hepatocellular carcinoma, precore mutation, tenofovir

Continuing Risk for Hepatitis B Virus Transmission Among Southeast Asian Infants in Louisiana

PEDIATRICS ◽  
1995 ◽  
Vol 96 (6) ◽  
pp. 1113-1116
Author(s):  
Francis J. Mahoney ◽  
Margaret Lawrence ◽  
Cathy Scott ◽  
Quan Le ◽  
Steve Lambert ◽  
...  
Keyword(s):  
Hepatitis B ◽  
Southeast Asian ◽  
Hepatitis B Vaccine ◽  
Hbv Infection ◽  
Hepatitis B Vaccination ◽  
Chronic Hbv Infection ◽  
Asian And Pacific Islander ◽  
B Virus ◽  
Asian Children ◽  
Chronic Hbv

Objective. Implementation and evaluation of a hepatitis B vaccination program for Southeast Asian infants in Louisiana. Methods. A baseline seroprevalence survey of hepatitis B virus (HBV) infection in US-born Southeast Asian children was conducted in 1991 before the implementation of a vaccination program. Hepatitis B vaccination and postvaccination serologic testing of survey participants 10 years of age and younger was performed. Eighteen months after the hepatitis B vaccine was integrated into infant immunization schedules in July 1993, a vaccination coverage survey was performed. Results. Baseline serologic testing was conducted on 96% of persons from 225 randomly selected households in a Southeast Asian community in Louisiana. Of 676 US-born children, 28 (4.1%) had chronic HBV infection; 61% of children with chronic HBV infection were born to hepatitis B surface antigen (HBsAg)-negative women. Among children born to HBsAg-negative women, the prevalence of chronic HBV infection increased with age, reaching 7.3% for children 13 to 16 years of age. Children born to HBsAg-negative women and living with carriers were 5.4 times more likely to have evidence of HBV infection than were children who did not live with carriers. Before the survey, only one child had received three doses of hepatitis B vaccine. In July 1993, 43% of Southeast Asian infants 9 to 18 months of age born in Louisiana had received three doses of hepatitis B vaccine. Infants who received immunizations from private providers were more likely to be fully vaccinated than were infants who received services from public sector clinics (prevalence ratio, 2.1; 95% confidence interval, 1.4,3.1). Conclusions. HBV transmission occurs throughout childhood in US-born Southeast Asian children, and the prevalence of chronic HBV infection approaches that of the country of origin. Few US-born Southeast Asian children have received hepatitis B vaccine. Because of the high rates of early childhood HBV transmission and the high risk of chronic infection in Asian and Pacific Islander communities, prevention efforts should be enhanced to ensure that all Asian and Pacific Islander infants receive hepatitis B vaccine in the first 12 months of life and that older children are vaccinated.

scholarly journals Hepatitis B-related hepatocellular carcinoma and stress: untangling the host immune response from clinical outcomes

2020 ◽  
pp. HEP35
Author(s):  
Peter D Block ◽  
Brianna Shinn ◽  
Jin Hyang Kim ◽  
Hie-Won Hann
Keyword(s):  
Hepatocellular Carcinoma ◽  
Immune Response ◽  
Chronic Hepatitis ◽  
Risk Factor ◽  
Hepatitis B ◽  
Chronic Stress ◽  
Hbv Infection ◽  
Host Factors ◽  
Chronic Hbv Infection ◽  
Chronic Hbv

Chronic hepatitis B virus (HBV) infection is a major public health challenge on the global scale. Affecting hundreds of millions worldwide, HBV is a leading risk factor for hepatocellular carcinoma (HCC). Clinical outcomes from chronic HBV infection are varied and appear to be influenced by a complex and dysregulated host immune response. In turn, much attention has been given to the immunologic response to HBV in an effort to identify host factors that lead to the development of HCC. However, the role of nonimmunologic host factors, such as chronic stress, in HBV-related HCC is poorly defined. Indeed, a growing appreciation for the effects of stress on chronic liver diseases raises the question of its role in chronic HBV infection. In this light, the present review will untangle the roles of key host factors in HBV-related HCC with an emphasis on chronic stress as a viable contributor. First discussed is the interplay of stress, inflammation and chronic liver disease. The host immune response’s role as a driver of HBV-related HCC is then reviewed, allowing for a close exploration of the effects of stress on immune function in chronic hepatitis B and as a potential risk factor for HBV-related HCC.

Hepatitis B Virus

2021 ◽  
Author(s):  
Ming V. Lin ◽  
April Wall
Keyword(s):  
Hepatocellular Carcinoma ◽  
Hepatitis B Virus ◽  
Hepatitis B ◽  
Chronic Infection ◽  
Treatment Options ◽  
Hbv Infection ◽  
Chronic Hbv Infection ◽  
Chronic Hepatitis B Virus ◽  
B Virus ◽  
Chronic Hbv

Chronic hepatitis B virus (HBV) infection is a major health burden worldwide, with approximately 257 million people with chronic infection. HBV is a small partially double-stranded DNA virus that replicates within the nucleus of the hepatocyte and commonly leads to chronic infection. Chronic HBV infection can cause cirrhosis, hepatocellular carcinoma, and extrahepatic manifestations such as glomerulonephritis or vasculitis. The latter is due to deposition of circulating immune complex in the different tissues. The natural history of HBV infection can be conceptualized as a spectrum encompassing different phases, including immune tolerance, immune clearance, inactive carrier, and reactivation and resolution. The diagnosis of the different phases of chronic HBV infection relies on various HBV serologies, liver enzyme levels, and histology findings. There are currently eight therapies approved for the treatment of HBV. Tenofovir alafenamide was the most recently approved therapy with a better side effect profile compared with tenofovir disoproxil fumarate. With the recent advances in the basic research in hepatitis B, new treatment options may become available in the near-future. This review contains 9 figures, 11 tables and 80 references Key words: cirrhosis, entecavir, Hepadnaviridae, hepatitis B virus, hepatocellular carcinoma, precore mutation, tenofovir

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