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. 1986 Feb;122(2):315–322.

Pathologic and ultrastructural changes of acute and chronic delta hepatitis in an experimentally infected chimpanzee.

S Govindarajan, H A Fields, C D Humphrey, H S Margolis
PMCID: PMC1888113  PMID: 3511726

Abstract

A hepatitis B surface antigen (HBsAg) chronic carrier chimpanzee experimentally superinfected with delta virus (DV) developed chronic DV infection. Over a period of 12 months, serologic and biochemical changes were correlated with morphologic abnormalities of the liver. Severe hepatic necrosis and inflammation accompanied the initial acute episode of hepatitis on Day 35 after inoculation, followed by complete resolution of these lesions over the next 3 months. A second episode of hepatitis occurred on Day 145, and severe necrosis and inflammation recurred along with the reappearance of delta antigen in the hepatocytes. Delta antigen persisted in the liver following the second episode of hepatitis and has remained positive throughout the observation period of 1 year. During the initial acute episode, the hepatocytes exhibited foamy cytoplasmic changes resembling microvesicular fat. However, ultrastructural studies of the same cells revealed only vacuolization of the cytoplasm without evidence of fat droplets. The inflammatory infiltrate during both episodes of hepatitis demonstrated a striking predominance of macrophages over lymphocytes. Hepatocyte abnormalities observed by electron microscopy included vacuoles, proliferated endoplasmic reticulum, and tubules similar to those seen in posttransfusion non-A, non-B hepatitis. However, the tubular and reticular abnormalities coincided with delta antigen expression in liver biopsies detected by direct immunoperoxidase staining and abnormal alanine aminotransferase levels in the serum, which suggests a possible causal relationship. Nuclear abnormalities were not seen.

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These references are in PubMed. This may not be the complete list of references from this article.

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