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Prevalence of Serological Hepatitis A and B Markers in a Rural Area of Northern Zaire

G. T. Werner^*, G. G. Frösner AND K. Fresenius

^* Municipal Hospital Bogenhausen, 8000 Munich 81
Max v. Pettenkofer-Institute, University of Munich
Department of Medicine II, Technical University Munich, FRG

In a seroepidemiological study of the population of a rural area in northern Zaire, markers of hepatitis A and B were determined. Examinations of serum specimens (n = 142) showed that hepatitis A is acquired early in childhood; virtually all persons beyond 20 years of age are immune. Capillary blood dried on filter discs (n = 352) gave accurate results only in childhood; in older individuals a high percentage of positive results was missed (20%), presumably due to lower anti-HAV titers in older persons. The dried-blood method showed similar limitations regarding the detection of hepatitis B markers. In the 5–7 year age group there was already a high prevalence of anti-HBc (59%) as determined by the dried blood method. In the 10–19 year age group the prevalence was 94% as determined by examination of serum specimens. In all age groups the percentage of HBsAg positive persons was 20.7%, as demonstrated in capillary blood specimens and 31.7% in serum specimens.

Accepted for publication December 3, 1984.

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