Urinary schistosomiasis associated with hepatitis C virus infection.

We studied 26 adult patients referred for cystoscopy: 13 consecutive patients with schistosome ova on bladder biopsy and antibodies to Schistosoma species in serum were classified as having urinary schistosomiasis, while 13 consecutive patients without schistosome ova on bladder biopsy and who were negative for antibodies to Schistosoma species in serum served as controls. Nine of 13 patients (70%) and none of 13 controls (p < 0.0005) had antibodies to hepatitis C virus in serum (anti-hepatitis C virus). All controls and patients who were negative for anti-hepatitis C virus had normal serum alanine aminotransferase levels, while 2 of 9 (22%) positive for anti-hepatitis C virus had elevated levels. Our study shows that patients with urinary schistosomiasis are at high risk for anti-hepatitis C virus positivity and that some of them may have active liver disease. Therefore, it is imperative to screen patients with urinary schistosomiasis for associated hepatitis C virus infection and liver disease.