Intrafamilial Transmission of Hepatitis B Virus: Frequency, Risk Factors, and Role of Hepatitis B Vaccination

Study Overview
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Brief Summary
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The primary aim of the study is to accomplish two major tasks: the first is to determine the frequency of intra-familial transmission of HBV; the second is trying to explore the potential risk factors of such a transmission .As a secondary aim, immunologic status of the household contacts vaccinated for hepatitis B will be evaluated to assess the efficacy of hepatitis B vaccination and its role in prevention of intra-familial transmission of HBV

Detailed Description
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Hepatitis B virus (HBV) infection is a global health issue; it is estimated that 257 million persons have chronic HBV (Asgeir et al., 2021). The major routes of HBV transmission include blood, sexual contact, vertical (from infected mothers to her children) and horizontal (between the spouses or children) transmission (Şükran et al., (2018). The household transmission of HBV is also a major health issue; it represents a challenge to the health system. Higher rates of HBV infection were reported among the household contacts of chronic HBV carriers; the prevalence of HBV infection among the family members of patients with chronic HBV can reach to 57%. Factors affecting the risk of transmission include socio-demographic status, family role (infected mothers increase the risk of transmission) and viral markers of the index case (Masomeh et al., 2016).The diagnosis of HBV infection is generally based on serological (hepatitis B surface antigen) and molecular assays (hepatitis B virus deoxyribonucleic acid) (Chen et al., 2017).Although the three-dose vaccination for hepatitis B provides more than 90% seroprotection rates (Van Den Ende C, et al, 2017); approximately 10% of vaccinated persons may be at risk of getting infected. Available data about the current status of intra-familial transmission of HBV among our community members are lacking; we need to determine the magnitude of such a major public health problem

Official Title
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Intrafamilial Transmission of Hepatitis B Virus: Frequency, Risk Factors, and Role of Hepatitis B Vaccination

Conditions
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HBV Transmission

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: : The household contacts of patients with chronic HBV infection will be included in the study. Exclusion Criteria: Those with prior diagnosis of HBV infection following the date of the primary case infection.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Determine the frequency of intra-familial transmission of HBV; & trying to explore the potential risk factors of such a transmission. | Determine the frequency of intra-familial transmission of HBV; & trying to explore the potential risk factors of such a transmission. | Baseline. | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To assess the efficacy of hepatitis B vaccination and its role in prevention of intra-familial transmission of HBV. | To assess the efficacy of hepatitis B vaccination and its role in prevention of intra-familial transmission of HBV. | Baseline. | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Intrafamilial transmission of HBV.