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American Journal of Pathology, Vol 115, 125-134, Copyright © 1984 by American Society for Investigative Pathology

REGULAR ARTICLES

Immunopathologic aspects of woodchuck hepatitis

D Frommel, D Crevat, L Vitvitsky, C Pichoud, O Hantz, M Chevalier, JA Grimaud, J Lindberg and CG Trepo

The natural history of infection with woodchuck hepatitis virus (WHV) has been studied in a colony of 38 Marmota monax. Besides serologic assessment for WHV markers, light-microscopic findings of 61 liver biopsies were correlated with the results of immunofluorescence analysis for nucleocapsid (WHcAg) and surface (WHsAg) antigens. Twenty- four chronic WHsAg carriers all featured signs of continuous viral replication. Two major immunomorphologic patterns were observed in their livers: 1) portal hepatitis in which WHcAg accumulated in the cytoplasm and WHsAg was associated with the hepatocyte membrane and 2) periportal hepatitis in which WHcAg shifted toward nuclear localization and WHsAg became mostly intracytoplasmic. Progression from portal to periportal hepatitis, observed in 7 woodchucks, appeared to be induced by a partial recovery of specific immune reactivity to WHV, insufficient, however, to interrupt WHV replication. Deposits of WHsAg and immunoglobulins were present in the kidney and spleen of animals with severe hepatitis.


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Copyright © 1984 by the American Society for Investigative Pathology.