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McFarlane, I.G. et al.

IgA class antibodies to hepatitis delta virus antigen in acute and chronic hepatitis delta virus infections.

Sera from 31 patients with chronic hepatitis delta virus infection and 18 patients with acute hepatitis delta virus infection were examined for IgA class antibodies to this virus using a newly developed enzyme immunoassay. IgA antibody to hepatitis D virus was detected in 21 (67.7%) of 31 patients with chronic delta viral hepatitis, but in only 1 (5.6%) of the 18 patients with acute infection (p less than 0.0005). Of the 21 patients with chronic delta hepatitis with IgA antibody to hepatitis D virus, 19 (90.5%) had moderate-to-severe activity on liver biopsy: 18 of the 21 had histological features of chronic active hepatitis and three had chronic lobular hepatitis. In all, 23 patients with chronic delta hepatitis had moderate-to-severe activity, and 19 (82.6%) had IgA antibody to hepatitis D virus. No statistically significant correlations were found between IgA antibody to hepatitis D virus and biochemical markers of liver injury (p greater than 0.4), or the presence of hepatitis delta virus antigen in liver biopsies (p greater than 0.2), in the patients with chronic delta hepatitis. The finding that IgA antibody to hepatitis D virus was almost exclusively associated with chronic hepatitis delta virus infection and correlated independently with moderate-to-severe histological activity (with a specificity of 90.5% and a sensitivity of 82.6%) suggests that this antibody might be a useful serological marker of underlying liver damage in chronic delta hepatitis.[1]

References

IgA class antibodies to hepatitis delta virus antigen in acute and chronic hepatitis delta virus infections. McFarlane, I.G., Chaggar, K., Davies, S.E., Smith, H.M., Alexander, G.J., Williams, R. Hepatology (1991) [Pubmed]

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