Absence of detectable hepatitis B virus DNA in sera and liver of chimpanzees with non‐A, non‐B hepatitis

Abstract

The risk of hepatitis B infections has been reduced by screening of blood donors for hepatitis B surface antigen (HBsAg). However, recipients remain at significant risk of developing post-transfusion hepatitis. Studies have shown that non-A, non-B hepatitis virus(es) are responsible for the majority of post-transfusion hepatitis infections. In spite of many efforts, these non-A, non-B hepatitis viruses have not yet been identified. Epidemiological studies, however, suggest that non-A, non-B hepatitis shares many features with hepatitis B. Recently, Wands et al [1982] showed, in chimpanzees infected with non-A, non-B hepatitis agents, the presence of antigenemia or viremia by radioimmunoassay with monoclonal antibodies directed toward distinct determinants of HBsAg and by molecular hybridization analysis. They suggested that non-A, non-B hepatitis agents may be related, but distinct variant(s) of hepatitis B virus (HBV). In this study, five chimpanzees were inoculated with three different agents that have been shown to transmit non-A, non-B hepatitis. The following inocula were used (I) a factor VIII preparation kindly provided by D.W. Bradley, (II) acute phase serum from a chimpanzee infected with the F strain kindly provided by A.J. Zuckerman, and (III) a DS-antigen serum previously shown by us to transmit non-A, non-B hepatitis [Duermeyer et al, 1983]. All chimpanzees developed a rise in transaminase levels between 8 and 10 weeks after inoculation. None of the chimpanzees was positive for any markers of HBV infection. No evidence was obtained of infection with hepatitis A, cytomegalovirus, or Epstein-Barr virus. One chimpanzee developed chronic liver disease.(ABSTRACT TRUNCATED AT 250 WORDS)

Επιδημιολογικη Και Εργαστηριακη Διερευνηση Της Ηπατιτιδας C Στον Βορειο Ελλαδικο Χωρο

“…Οι προσπάθειες των διαφόρων ερευνητών να παρατηρήσουν αυτόν τον παράγοντα με το ηλεκτρονικό μικροσκόπιο δεν απέδωσαν, παρ' όλο που και σε διάφορες εργασίες αναφέρεται η ανακάλυψη ορισμένων μορφών, που όμως ποτέ δεν αποδείχτηκε ότι ήταν οι υπεύθυνοι για την ΜΑΜΒ ηπα τίτιδα παράγοντες 22 • 39 . Εξάλλου οι προσπάθειες των ερευνητών να αποδεί ξουν κάποια σχέση μεταξύ αυτού του παράγοντα και τους ιούς της ηπατίτι δας Β ή D δεν κατέληξαν σε αποτέλεσμα 40 • 41 • 42 • 43 • 44 .…”