Viral hepatitis, type B, in experimental animals.

The American Journal of the Medical Sciences
L F BarkerW T London

Abstract

Evidence of natural infection with hepatitis B virus (HBV) in chimpanzees was followed by demonstration that this species provides a highly sensitive animal model system for experimental type B hepatitis. With rare exceptions, inoculation of sero-negative chimps with materials containing infectious HBV produces serologic evidence of infection including appearance of circulating hepatitis B surface antigen (HBs Ag) and subsequently development of antibody to HBs Ag and hepatitis B core antigen. Serum enzyme elevations indicative of liver damage occurred in 31 of 46 aminals infected to date. The antigenic subtypes of HBV in the inocula breed true in the infected animals, and HBV titers of sera containing the adw and ayw subtypes have been established as 10(7.5) infectious units/ml. Rhesus monkeys also provide a valuable animal model for type B hepatitis, but they appear to be less sensitive than chimps, and they do not develop evidence of liver damage.

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