RATE OF HBSAG POSITIVITY IN IRANIANS FOLLOWING HEPATITIS B MASS VACCINATION

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ZALI MOHAMMAD REZA; MOHAMMAD K.; NOURBALA A.A.; SHAHRAZ S.; MOHRAZ M.; NOURI NAYER B.; SHERAFAT KAZEMZADEH E.

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Journal: JOURNAL OF RESEARCH IN MEDICAL SCIENCES (JRMS) Year:2003 | Volume:7 | Issue:4 Page(s): 304-306

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Title

RATE OF HBSAG POSITIVITY IN IRANIANS FOLLOWING HEPATITIS B MASS VACCINATION

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Keywords

HBSAGQ4

VACCINATIONQ3

IRANQ2

Abstract

Introduction: Hepatitis B is one of the most common viral infections in the world. Seroepidemiological surveys have been generally used to estimate its prevalence in different parts of the world. Mass VACCINATION against HBV has been implemented in IRAN since 1993. Comparing rates of HBSAG carrier state in children of 2-14 years old before and after implementation of mass VACCINATION program may be an indirect evidence of the effectiveness of this program in an underdeveloped country. Methods: Two large seropepidemiological surveys of hepatitis B were conducted in IRAN between 1991 and 1999 as part of the health and disease survey in the Islamic republic of IRAN (HDSIRI 1 and 2) on a representative sample of about 1/1000 of the population. During the first health survey 39841 individuals were evaluated serologically for HBSAG in their sera and during the second survey, 46631 individuals were tested. Rates of positivity for different age and sex groups, and for urban and rural areas were calculated and compared using a confidence interval (Cl) of 95% for comparison. Results: In HDSlRl-1, rate of positivity was 1.7% with 95% Cl being 1.6%-1.8%. HBSAG positivity rate in HDSIRI-2 was again 17% (95% Cl: 1.6%-1.9%). There seems to be no difference between the HBSAG positivity rates between the two surveys overally but a significant reduction in HBSAG positivity rate in the age subgroup 2-14 years has occurred (1.3% vs. 0.8%, P<0.05, 95% Cl for difference between proportions: 0.003-0.007). Interestingly, we observed a significantly higher decline in hepatitis B virus carrier rate in rural parts compared to urban areas (1.5% vs. 0.6% for rural areas, 1.1% vs. 0.9% in urban areas). Discussion: There seems a reduction in hepatitis B carrier rate have occurred in a subgroup of young children in IRAN after mass VACCINATION program implementation against hepatitis B. The decline appears to be more significant in rural parts against urban areas despite lower socioeconomic level in rural areas. This may be due to a better VACCINATION surveillance and coverage in rural areas as part of the "Health Houses. program in IRAN.

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APA: Copy

ZALI, MOHAMMAD REZA, MOHAMMAD, K., NOURBALA, A.A., SHAHRAZ, S., MOHRAZ, M., NOURI NAYER, B., & SHERAFAT KAZEMZADEH, E.. (2003). RATE OF HBSAG POSITIVITY IN IRANIANS FOLLOWING HEPATITIS B MASS VACCINATION. JOURNAL OF RESEARCH IN MEDICAL SCIENCES (JRMS), 7(4), 304-306. SID. https://sid.ir/paper/26661/en

Vancouver: Copy

ZALI MOHAMMAD REZA, MOHAMMAD K., NOURBALA A.A., SHAHRAZ S., MOHRAZ M., NOURI NAYER B., SHERAFAT KAZEMZADEH E.. RATE OF HBSAG POSITIVITY IN IRANIANS FOLLOWING HEPATITIS B MASS VACCINATION. JOURNAL OF RESEARCH IN MEDICAL SCIENCES (JRMS)[Internet]. 2003;7(4):304-306. Available from: https://sid.ir/paper/26661/en

IEEE: Copy

MOHAMMAD REZA ZALI, K. MOHAMMAD, A.A. NOURBALA, S. SHAHRAZ, M. MOHRAZ, B. NOURI NAYER, and E. SHERAFAT KAZEMZADEH, “RATE OF HBSAG POSITIVITY IN IRANIANS FOLLOWING HEPATITIS B MASS VACCINATION,” JOURNAL OF RESEARCH IN MEDICAL SCIENCES (JRMS), vol. 7, no. 4, pp. 304–306, 2003, [Online]. Available: https://sid.ir/paper/26661/en

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