2015 Fiscal Year Final Research Report
Estimating number of HBV carriers infected through needle/syringe sharing, and number of carriers infected from imported HBV carriers
| Project/Area Number |
25460631
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Medical sociology
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| Research Institution | Tokai University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 肝炎ウイルス / 集団予防接種 / 輸入感染例 / 肝炎キャリア |
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| Outline of Final Research Achievements |
The Japanese Government settled a class litigation case with hepatitis B virus (HBV) carriers who claim to have been infected through needle/syringe sharing in mass vaccination with a compensation agreement. Thus, how many of the present HBV carriers were infected horizontally from mass vaccination was estimated. One of two reports showed the ratio horizontal to vertical infection decreased exponentially, the other showed the ratio decreased linearly from 1950 to 1960. In this study, the estimated prevalence of HBV carriers by horizontal infection decreased from 0.12% to 0.07%. As progressing globalization, acute hepatitis of HBV cases caused by sexual transmission were observed in urban areas. Significant positive correlation between number of imported people from endemic countries and the prevalence of acute hepatitis of HBV with Genotype A. Model also showed estimated that increase in imported cases may increase its prevalence.
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| Free Research Field |
公衆衛生学
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