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The Efficacy of Hepatitis B Vaccination among School Age Children in Southern Iran

AUTHORS

SA Hashemi 1 , M Moghadami 2 , * , KB Lankarani 1 , A Alborzi 1 , A Mahbudi 1

AUTHORS INFORMATION

1 Department of Internal Medicine,Shiraz University of Medical Sciences, Fars, Iran

2 Department of Internal Medicine, Nemazee Hospital, Shiraz University of Medical sciences, m_moghadami@hotmail.com, Fars, Iran

How to Cite: Hashemi S, Moghadami M, Lankarani K, Alborzi A, Mahbudi A. The Efficacy of Hepatitis B Vaccination among School Age Children in Southern Iran, Iran Red Crescent Med J. Online ahead of Print ; 12(1):45-48.

ARTICLE INFORMATION

Iranian Red Crescent Medical Journal: 12 (1); 45-48
Article Type: Research Article
Received: April 23, 2009
Accepted: July 5, 2009

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Abstract

Background: Primary prevention by vaccination to increase herd immunity remains the main thrust in the control of hepatitis B virus (HBV) infection and many countries such as Islamic Republic of Iran have incorporated HBV vaccination into their national expanded program of immunization. This study was performed to determine the vaccine efficacy of hepatitis B infection between vaccinated and non-vaccinated school-aged children.

 

Methods: Three hundred and ninety four students aged 6 to 8 years who received the hepatitis vaccine in the infancy and 314 students aged 9 to 10 years who did not receive it in Sepidan, southern Iran were enrolled. We also determined the titer of anti HBs Ab in the vaccinated students.

 

Results: Two students (0.5 %) were HBV infected (positive HBC Ab) and none were a chronic carrier. Two hundred and forty nine students (63.2%) had anti HBs titer greater than 10 IU/ml. One hundred and seventeen students (30%) had anti HBs titer between 1 and 10 IU/ml and only 28 children had anti HBs titer less than 1 IU/ml. Five (1.6%) were HBV infected (positive HBc Ab) and 2 (0.6%) were chronic carriers (positive HBs Ag). The efficacy of the vaccine 6-8 years after vaccination was 67.9 %( 95 CI 78-92).

 

Conclusion: Our results showed that similar to other studies, vaccination could not reduce the infection rate but had a significant effect on the reduction of chronic infection and carrier state, emphasizing on the role of vaccination in the control of HBV infection in an endemic region.

 

Keywords

Hepatitis B Vaccination Efficacy Southern Iran

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