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Hepatitis A:Epidemiology and prevention in developing countries

World Journal of Hepatology 2012年第3期4卷 68-73页

作者： Elisabetta Franco Cristina Meleleo laura serino Debora Sorbara laura Zaratti Department of Public HealthUniversity Tor Vergata Specialization School for Hygiene and Preventive Medicine University Tor Vergata

Hepatitis A is the most common form of acute viral hepatitis in the *** geographical differences in endemicity of hepatitis A are closely related to hygienic and sanitary conditions and other indicators of the level of socioeconomic *** anti-hepatitis A virus(HAV)seroprevalence rate is presently decreasing in many parts of the world,but in less developed regions and in several developing countries,HAV infection is still very common in the first years of life and seroprev-alence rates approach 100%.In areas of intermediate endemicity,the delay in the exposure to the virus has generated a huge number of susceptible adolescents and adults and significantly increased the average age at *** the severity of disease increases with age,this has led to outbreaks of hepatitis *** factors contribute to the decline of the infection rate,including rising socioeconomic levels,increased access to clean water and the availability of a hepatitis A vaccine that was developed in the *** populations with a high proportion of susceptible adults,implementing vaccination programs may be *** this report,we review available epidemiological data and implementation of vaccination strategies,particularly focusing on developing countries.

关键词： Hepatitis A Developing countries Endemic-ity Seroprevalence Vaccine

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Hepatitis B:Epidemiology and prevention in developing countries

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World Journal of Hepatology 2012年第3期4卷 74-80页

作者： Elisabetta Franco Barbara Bagnato Maria Giulia Marino Cristina Meleleo laura serino laura Zaratti Department of Public Health University Tor Vergata PhD Program for Methodologies in Preventive Medicine and Therapy University Tor Vergata Specialization School for Hygiene and Preventive Medicine University Tor Vergata

Hepatitis B virus(HBV)infection is a serious global public health *** infection may be transmitted through sexual intercourse,parenteral contact or from an infected mother to the baby at birth and,if contracted early in life,may lead to chronic liver disease,including cirrhosis and hepatocellular *** the basis of the HBV carrier rate,the world can be divided in 3 regions of high,medium and low *** major concern is about high endemicity countries,where the most common route of infection remains vertical transmission from mother to *** of all pregnant women and passive immunization with human hepatitis B immunoglobulin are not affordable for many developing *** infection rate can be reduced by modifying behavior,improving individual education,testing all blood donations,assuring asepsis in clinical practice and screening all pregnant ***,availability of a safe and efficacious vaccine and adoption of appropriate immunization strategies are the most effective means to prevent HBV infection and its *** unsolved problem for poorest countries,where the number of people currently infected is high,is the cost of the vaccine.A future challenge is to overcome the social and economic hurdles of maintaining and improving a prevention policy worldwide to reduce the global burden of the disease.

关键词： Hepatitis B Developing countries Endemicity Seroprevalence Vaccine

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