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Abstract
99 HBsAg-positive blood donors (BDs) were discovered in Göteborg during 1970–84. Of the 82 patients where the outcome is known 46 had transient and 36 persistent antigenemia. Chronic hepatitis was found in 6 patients while 30 were asymptomatic carriers. Three BDs had died, 1 of them from cholangiocellular cancer. An obvious mode of transmission was demonstrated for 19 BDs, i.v. drug abuse being the most frequent one. Five BDs originated from countries with a known high prevalence of hepatitis B virus (HBV). Family contacts of the remaining carriers had serological markers for HBV in the following frequencies: mothers 46%, siblings 39%, fathers 25%, children 13%, spouses 10%. Only children of female carriers had markers for HBV infection. Intrafamiliar transmission during childhood is an important route of transmission even in a country with low HBV endemicity and amongst people without connection with endemic regions. This population may be susceptible to the consequences of a long-term carriership of HBV.