scholarly journals Mortality in relation to hepatitis B virus (hbv) infection status among hiv‐hbv co‐infected patients in sub‐Saharan Africa after immediate initiation of antiretroviral therapy

2020 ◽  
Author(s):  
Amir M. Mohareb ◽  
Gérard Menan Kouamé ◽  
Audrey Gabassi ◽  
Delphine Gabillard ◽  
Raoul Moh ◽  
...  
Keyword(s):  
Hepatitis B Virus ◽  
Antiretroviral Therapy ◽  
Hepatitis B ◽  
Hbv Infection ◽  
Sub Saharan Africa ◽  
Infection Status ◽  
B Virus ◽  
Sub Saharan

The risk of hepatitis B virus infection by transfusion in Kumasi, Ghana

Blood ◽  
2003 ◽  
Vol 101 (6) ◽  
pp. 2419-2425 ◽  
Author(s):  
Jean-Pierre Allain ◽  
Daniel Candotti ◽  
Kate Soldan ◽  
Francis Sarkodie ◽  
Bruce Phelps ◽  
...  
Keyword(s):  
Hepatitis B Virus ◽  
Hepatitis B ◽  
Blood Donors ◽  
Hepatitis B Surface Antigen ◽  
Hbv Dna ◽  
Hbv Infection ◽  
Sub Saharan Africa ◽  
B Virus ◽  
Sub Saharan ◽  
Hbv Transmission

The risk of hepatitis B virus (HBV) transmission by transfusion in sub-Saharan Africa is considered to be relatively low, and testing of blood donors is often not done or is done relatively poorly. To re-examine this attitude, we identified HBV chronically infected blood donors from a major hospital in Ghana with a range of hepatitis B surface antigen (HBsAg) assays. Test efficacy was estimated using HBV DNA as a gold standard, and the risk of HBV infection in blood recipients was estimated for different testing strategies. Particle agglutination, dipstick, and enzyme immunoassay (EIA) HBsAg screening detected 54%, 71%, and 97% of HBV infectious donors, respectively. The risk of HBV transmission to recipients less than 10 years old ranged between 1:11 and 1:326 with blood unscreened and screened by EIA, respectively. For older recipients, the risk decreased a further 4-fold because of the high frequency of natural exposure to HBV. A total of 98% of HBsAg-confirmed positive samples contained HBV DNA. HBV DNA load was less than 1 × 104 IU/mL in 75% of HBsAg-reactive samples, most of them anti-HBe reactive. Approximately 0.5% of HBsAg-negative but anti-HBc-positive samples contained HBV DNA. The use of sensitive HBsAg tests is critical to prevent transfusion transmission of HBV infection to young children in a population with a 15% prevalence of chronic HBV infection in blood donors. However, this will not have much effect on the prevalence of this infection unless other strategies to protect children from infection are also advanced in parallel.

scholarly journals Epidemiology of Hepatitis B Virus (HBV) and Hepatitis C Virus (HCV) Related Hepatocellular Carcinoma

2018 ◽  
Vol 12 (1) ◽  
pp. 26-32 ◽  
Author(s):  
Arnolfo Petruzziello
Keyword(s):  
Risk Factors ◽  
Hepatocellular Carcinoma ◽  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Hepatitis B Virus ◽  
Hepatitis B ◽  
Hbv Infection ◽  
Sub Saharan Africa ◽  
Liver Cancers ◽  
B Virus

Introduction:Hepatocellular carcinoma (HCC) is one of the most prevalent primary malignant tumors and accounts for about 90% of all primary liver cancers. Its distribution varies greatly according to geographic location and it is more common in middle and low- income countries than in developed ones especially in Eastern Asia and Sub Saharan Africa (70% of all new HCCs worldwide), with incidence rates of over 20 per 100,000 individuals.Explanation:The most important risk factors for HCC are Hepatitis B Virus (HBV) infection, Hepatitis C Virus (HCV) infection, excessive consumption of alcohol and exposition to aflatoxin B1. Its geographic variability and heterogeneity have been widely associated with the different distribution of HBV and HCV infections worldwide.Chronic HBV infection is one of the leading risk factors for HCC globally accounting for at least 50% cases of primary liver tumors worldwide. Generally, while HBV is the main causative agent in the high incidence HCC areas, HCV is the major etiological factor in low incidence HCC areas, like Western Europe and North America.Conclusion:HBV-induced HCC is a complex, stepwise process that includes integration of HBV DNA into host DNA at multiple or single sites. On the contrary, the cancerogenesis mechanism of HCV is not completely known and it still remains controversial as to whether HCV itself plays a direct role in the development of tumorigenic progression.

Untreated highly viraemic pregnant women from Asia or sub-Saharan Africa often transmit hepatitis B virus despite serovaccination to newborns

2014 ◽  
Vol 35 (2) ◽  
pp. 409-416 ◽  
Author(s):  
Pierre Sellier ◽  
Sarah Maylin ◽  
Rishma Amarsy ◽  
Marie-Christine Mazeron ◽  
Lucile Larrouy ◽  
...  
Keyword(s):  
Hepatitis B Virus ◽  
Hepatitis B ◽  
Pregnant Women ◽  
Sub Saharan Africa ◽  
B Virus ◽  
Sub Saharan

Hepatitis B virus activity in untreated hepatitis B e antigen–negative human immunodeficiency virus–hepatitis B virus co-infected patients from sub-Saharan Africa

2019 ◽  
Vol 113 (8) ◽  
pp. 437-445
Author(s):  
Anders Boyd ◽  
Menan Gerard Kouamé ◽  
Laura Houghtaling ◽  
Raoul Moh ◽  
Delphine Gabillard ◽  
...  
Keyword(s):  
Human Immunodeficiency Virus ◽  
Hepatitis B Virus ◽  
Hepatitis B ◽  
Hbv Dna ◽  
Sub Saharan Africa ◽  
Hepatitis B E Antigen ◽  
Hiv Rna ◽  
B Virus ◽  
Immunodeficiency Virus ◽  
Sub Saharan

Abstract Background In human immunodeficiency virus (HIV) and hepatitis B virus (HBV) co-infected patients from sub-Saharan Africa with hepatitis B e antigen (HBeAg)-negative status, data are limited on the evolution of HBV activity when antiretroviral treatment (ART) is absent. Methods A total of 43 HBeAg-negative co-infected patients not indicated for ART (per concomitant World Health Organization recommendations) were followed during participation in a randomized controlled trial in Côte d’Ivoire. Chronic HBeAg-negative phases were classified at yearly visits and defined as ‘infection’ (HBV DNA ≤10 000 copies/mL and normal alanine aminotransferase [ALT]) or ‘hepatitis’ (HBV DNA >10 000 copies/mL and/or above normal ALT). Dispersion in HBV DNA and ALT levels during follow-up was assessed using interquartile range (IQR) regression. Results During a median 25 months (IQR 19–31), 17 (40%) patients consistently had ‘infection’, 5 (12%) consistently had ‘hepatitis’ and 21 (48%) fluctuated between phases. Wider dispersion in HBV DNA over time was associated with higher baseline HIV RNA (p=0.02) and higher baseline HBV DNA levels (p=0.008), while wider dispersion in ALT was associated with higher baseline HIV RNA (p<0.001), higher baseline ALT levels (p=0.02) and baseline hepatitis surface antigen >4.0 log10 IU/mL (p=0.02). Conclusions HBV activity is common with HBeAg-negative status, whose variation is partly linked to HIV replication. Fluctuations in disease phase make it difficult to assess the risk of morbidity and mortality after ART initiation.

scholarly journals Trends in hepatitis B virus testing practices and management in HIV clinics across sub-Saharan Africa

2017 ◽  
Vol 17 (S1) ◽  
Author(s):  
Patrick A. Coffie ◽  
◽  
Matthias Egger ◽  
Michael J. Vinikoor ◽  
Marcel Zannou ◽  
...  
Keyword(s):  
Hepatitis B Virus ◽  
Hepatitis B ◽  
Sub Saharan Africa ◽  
B Virus ◽  
Testing Practices ◽  
Sub Saharan ◽  
Virus Testing

scholarly journals Epidemiological patterns of hepatitis B virus (HBV) in highly endemic areasr

1996 ◽  
Vol 117 (2) ◽  
pp. 313-325 ◽  
Author(s):  
W. J. Edmunds ◽  
G. F. Medley ◽  
D. J. Nokes ◽  
C. J. O'Callaghan ◽  
H. C. Whittle ◽  
...  
Keyword(s):  
Hepatitis B Virus ◽  
Hepatitis B ◽  
East Asia ◽  
Horizontal Transmission ◽  
Perinatal Transmission ◽  
Sub Saharan Africa ◽  
B Virus ◽  
Age Dependent ◽  
Endemic Areas ◽  
Sub Saharan

SummaryThis paper uses meta-analysis of published data and a deterministic mathematical model of hepatitis B virus (HBV) transmission to describe the patterns of HBV infection in high endemicity areas. We describe the association between the prevalence of carriers and a simple measure of the rate of infection, the age at which half the population have been infected (A50), and assess the contribution of horizontal and perinatal transmission to this association. We found that the two main hyper-endemic areas of sub-Saharan Africa and east Asia have similar prevalences of carriers and values of A50, and that there is a negative nonlinear relationship between A50 and the prevalence of carriers in high endemicity areas (Spearman's Rank, P = 0·0086). We quantified the risk of perinatal transmission and the age-dependent rate of infection to allow a comparison between the main hyper-endemic areas. East Asia was found to have higher prevalences of HBeAg positive mothers and a greater risk of perinatal transmission from HBeAg positive mothers than sub-Saharan Africa, though the differences were not statistically significant. However, the two areas have similar magnitudes and age-dependent rates of horizontal transmission. Results of a simple compartmental model suggest that similar rates of horizontal transmission are sufficient to generate the similar patterns between A50 and the prevalences of carriers. Interrupting horizontal transmission by mass immunization is expected to have a significant, nonlinear impact on the rate of acquisition of new carriers.

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