ISOLATION AND PROPAGATION OF HEPATITIS A VIRUS IN VITRO
Abstract: A Strain of hepatitis A virus(S_(84-1))was directly isolated from a fecal specimen of acute patient with hepatitis A and serially passaged in human diploid fibroblast(2BS). Some conditions of cultivation of this virus were also studied. Following serial propagation, the incubation time of S_(84-1) virus was reduced from one and half months(passage 2) to 3 days(passage 12). S_(84-1) virus, without cytopathie effect, can t be detected in supernatant fluid by ELISA and was harvested by freezing-throwing the ce...