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© 1992 Oxford University Press

research-article

Sociodemographic Factors and the Declining Prevalence of Anti-Hepatitis A Antibodies in Young Adults in Israel: Implications for the New Hepatitis A Vaccines

MANFRED S GREEN*,{dagger}, SIGALIT TSUR* and RAPHAEL SLEPON*

*Medical Corps, Israe Defence Force Israel

Reprint requests to: {dagger}Occupational Health Institute, At Loewenstein Hospital, PO Box 3, Raansns 43100, Israel

Green M S (Medical Corps, Israel Defence Force, Israel), Tsur S and Slepon A. Sociodemographic factors and the declining prevalence of anti-hepatitis A antibodies in young adults in Israel: implications for the new hepatitis A vaccines. Internationl Journal of Epidemiology 1992; 21: 136–141.

In order to examine changes in the epidemiology of hepatitis A virus (HAV) infection in Israel during the past decade, a sero-epidemiological study was carned Out in 1989 in a random sample of 1153 members of the permanent army, aged 21–30 years. Of the males 59.2%, and 54.3% of the females were anti-HAV antibody positive (p = 0.22). At all ages, the highest prevalence was in those of North African origin, followed by those of Asian, native lseaeli and Western origin. There was a marked decline in the prevalence of antibodies in later birth cohorts, (from 74.4% in those born in 1959–1960, to 47.8% in those born in 1967–1968). Age, ethnic origin, number of siblings, more than two younger siblings and smoking were independently significantly associated with anti-HAV antibodies. Despite an overall decline in family size in later birth cohorts, ethnic differences remain prominent. These findings suggest that when the new active hepatitis A vaccines become available, their use in small children should dramatically reduce the incidence of diseases in highly endemic areas by limiting intrafamilial spread of the disease.

Received 1 May 1991


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