Abstract
This case-control study was designed to determine the prevalence of persistent hepatitis B surface antigenemia (HBsAG) among patients with schistosoma mansoni and to rationalize their vaccination against hepatitis B virus (HBV) infection. Seventy consecutive patients with a confirmed diagnosis of schistosoma mansoni were matched for age, sex, nationality, and residence (for Saudis only) with 70 healthy controls. Despite identical mean ages, sex, and nationality distribution, 18 schistosomiasis patients (26%) had positive HBsAg as compared with only three of the controls (4%). The odd ratio for HBsAg antigenemia among patients as compared to controls was 7.73 (95% confidence interval (CI) = 2-35.01, P = 0.0004. Neither sex nor nationality had any influence on the positive rate for HBsAg found in schistosomiasis patients. Patients with schistosomiasis and a concomitant positive HBsAg had significantly more derangement of their hepatic enzymes (14 out of 18; 78%) as compared with those without this viral serological marker (22 out of 52; 42%) (odd ratio - 4.77; 95% CI=1.22-20.11; P = 0.009). I have concluded that patients with schistosoma mansoni are exposed to a higher risk of acquiring HBV infection and that concomitant schistosomiasis and HBV infection has a deleterious effect on hepatic enzymes as well as other liver functions. Prospective evaluation of the preventive role of HBV vaccine among these patients is warranted.
Published Version
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