VIRAL HEPATITIS A AND B; A SEROEPIDEMIOLOGICAL STUDY OF A NON‐HEPATITIC SYDNEY POPULATION

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Abstract
The age‐specific prevalence rates of hepatitis A and B virus markers in 683 patients of all ages with non‐hepatitic illnesses admitted to a Sydney hospital over the period from 1971 to 1974 were determined. The pattern of prevalence rates of hepatitis A antibody (anti‐HAV) appeared to be a cumulative one, with steadily increasing rates in patients up to the age of 40 years. Thereafter a large increase in prevalence occurred. In contrast, prevalence rates for hepatitis B virus (HBV) markers were fairly uniform for all age groups. Antibody to core antigen (anti‐HBc) was the most frequent marker of HBV infection. Prevalence rates in subjects of non‐Anglo‐Saxon origin were higher for both HAV and HBV markers.

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