Prevalence of hepatitis [B] surface antigen among urinary schistosomal patients receiving frequent parenteral antischistosomal therapy

The incidence of HBs antigenaemia in urinary nonhepatosplenomegalic schistosomal male patients was 10% [P < 0.01] in patients with history of repeated antischistosomal therapy and only 3% [P > 0.05] in absence of this history. The incidence in normal controls was 2.1%