Studies on outbreak of viral hepatitis at Calcutta with special reference to serological investigations.

Sixty cases of acute viral hepatitis were studied from clinical, biochemical and in particular serological point of view. Majority of the patients had significant pre-icteric and icteric phase with moderate elevations of bilirubin, SGOT and SGPT and marginal elevations of serum alkaline phosphatase. Cholestatic features were observed only in 6.7% of cases. All subjects improved and there was no death in this series. Serological marker studies revealed hepatitis A in 8 (13.3%) cases and hepatitis B in 3 (5.0%) cases. Rest 49 cases were possibly due to non-A, non-B hepatitis. As there was no evidence of parenteral transmission, it was concluded that this epidemic was water borne from contaminated municipal water supply.