Seroepidemiological Investigation on HBV Infection in Some Areas of Gansu Province

A Sercepidemiological investigation on HBV infection of in some areas of Gansu province was carricd out from 1992 to 1994．The results showed that the general infection rate of HBV was 562.30％．The positive rates ofHBsAg，anti-HBs，anti-HBc were 7.50%，36.65% and 44.90％respectively．There was a significant difference of the infection rates of HBV between urban and rural areas。The infection rate of HBV was increased with age．The distribution of posi-tire cases of HBsAg was revealed obviously tendency toward family clustering.There was a close relation of the positive rate of HBsAg between parents and their children．Thee were 69 cases of HBeAg positive，12 cases both positive of HBsAg and anti-HBs in 186 HBsAg positive cases.