The role of acute hepatitis type A, B, and non-A non-B in the development of chronic active liver disease.

In 19 patients followed from biopsy-verified acute viral hepatitis to chronic active liver disease and 74 patients followed to complete resolution verified by a normal liver biopsy, sera from the acute phase were studied for serologic evidence of hepatitis type A and B. Eleven of the 19 patients who developed chronic active liver disease progressed from acute hepatitis type B and 7 from acute hepatitis type non-A non-B. One patient could not be classified because the sera were exhausted. None had serological markers of actual hepatitis type A infection. Of the 74 patients with a histologically complete resolution, the acute episode could be classified as type B hepatitis in 47 and type A hepatitis in 13 patients. The remaining 14 patients were classified as having acute viral hepatitis type non-A non-B. Our findings confirm that type B and non-A non-B hepatitis may give rise to chronic liver disease, whereas type A hepatitis so far has not been demonstrated to initiate a chronic liver disease.