HEPATITIS C
It is now known that a large number of hepatitis
cases are due to an RNA virus termed hepatitis C virus. Its existence and role
in the etiology of hepatitis was identified by prepar-ing numerous
complementary DNA clones from the presumed RNA virus in infectious serum.
Peptides encoded by these clones were then tested for reaction with sera from
cases of hepatitis and one was found to be highly specific, providing a basis
for a serologic test.
VIROLOGY
Hepatitis C virus is an RNA virus in the flavivirus
(eg, yellow fever, dengue) family. It has a very simple genome, consisting of
just three structural and five nonstructural genes. There are at least six
major genotypes, with multiple subtypes. The genotypes have differ-ent
geographic distributions and may be associated with differing severity of
disease as well as response to therapy.
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