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  • Title: Hepatitis A antigen particles in liver, bile, and stool of chimpanzees.
    Author: Schulman AN, Dienstag JL, Jackson DR, Hoofnagle JH, Gerety RJ, Purcell RH, Barker LF.
    Journal: J Infect Dis; 1976 Jul; 134(1):80-4. PubMed ID: 181500.
    Abstract:
    Virus-like hepatitis A antigen (HA Ag) particles, presumably hepatitis A virus, were isolated from the liver, bile, and stool of three chimpanzees that had been infected with stool filtrates containing HA Ag particles. Specimens of serum, stool, liver biopsy material, and bile were obtained at selected intervals during the experiment. The animals developed mild hepatitis 19-21 days after inoculation, and antibody to HA Ag appeared de novo in their convalescent-phase serum. During acute illness, virus-like particles similar to the HA Ag particle were seen in liver cell cytoplasm by electron microscopy. HA Ag particles were detected by immune electron microscopy and a new radioimmunoassay in isopycnically banded samples of liver, bile, and stool. HA Ag particles were found at densities of 1.29-1.39 g/cm3, but the major peak density for antigen particles in samples of liver, bile, and stool was approximately 1.34 g/cm3. The fact that HA Ag particles can be recovered from chimpanzee liver, bile, and stool makes these potentially important sources of infectious and antigenic materials.
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