| enterically transmitted hepatitis in saudi arabia: an epidemiological study. | rates of exposure to two, enterically transmitted viruses, hepatitis e virus (hev) and hepatitis a virus (hav), were investigated among the populations of two areas of saudi arabia: gizan (a rural area) and riyadh (an urban area, with relatively good sanitation). in riyadh, 24.7% and 1.2% of children were seropositive for hav and hev, respectively, by the age of 12 years. there was a sharp increase in exposure to hav between 13 and 20 years of age (to 63.5%) and most (80.0%) of the subjects aged ... | 1996 | 8762410 |