Co-Authors:
Nasser, A.M., Department of Virology and Epidemiology, Baylor College of Medicine, Houston, TX 77030, United States
Metcalf, T.G., Department of Virology and Epidemiology, Baylor College of Medicine, Houston, TX 77030, United States
Abstract:
Cytopathic effects were produced in fetal rhesus monkey kidney (FRhK-4) cells 7 days postinfection by a serially BS-C-1-passaged strain of hepatitis A virus. Typical enterovirus cytopathology was produced by the HM-175 strain after 15 passages at 7-day intervals in BS-C-1 cells. No cytopathic effects were obtained after neutralization of virus with human anti-hepatitis A virus immunoglobulin G. Normal human serum had no effect on development of cytopathology. Maximum antigen and cDNA probe-based hybridization activity were associated with a CsCl gradient fraction having a density of 1.34 g/cm 3. Large quantities of 27- to 30-nm virions typical of hepatitis A virus were associated with the same fraction. These data led to the conclusion that the observed cytopathology was caused by hepatitis A virus.