A model for hepatitis B virus-associated chronic liver disease has been mad
e using cloned hepatitis B virus DNA as a transgene in a severe combined im
munodeficient host. These mice consistently support virus gene expression a
nd replication. After adoptive transfer of unprimed, syngeneic splenocytes,
these mice cleared virus from liver and serum, and developed chronic liver
disease. This model will permit identification of the host and virus contr
ibutions to chronic liver disease in the absence of tolerance.