IgA class antibodies to hepatitis delta virus antigen in acute and chronic hepatitis delta virus infections
Ian G. McFarlane, Kanchan Chaggar, Susan E. Davies, Heather M. Smith, Graeme J. M. Alexander, Roger Williams – 1 December 1991 – 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 < 0.0005).