Testing of blood sera of 63 hemophiliacs revealed markers of hepatitid
es B and C in 97 and 98% cases, respectively. Polymerase chain reactio
n confirmed the presence of hepatitis C virus (HCV) RNA in 31 (94%) ou
t of 33 sera tested which contained antibodies to HCV. Gene typing of
the isolated strains revealed the presence of three types of HCV: 1b (
94%), 2a (3%), and 3a (3%). Similar distribution of HCV genotypes was
revealed in the blood sera of 39 patients with chronic hepatitis C.