title: Cyclic excretion of hepatitis A virus in experimentally infected chimpanzees: biophysical characterization of the associated HAV particles.
abstract: Experimental infection of two chimpanzees with the Phoenix Antigen strain of HAV resulted in the cyclic excretion of virus particles on days 9-11, 14-15, and 20-21 postinoculation. Isopycnic banding in CsCl of stool suspensions prepared from 9-11; 14-15; and 17, 19, 21 dav stool pools revealed multiple buoyant densities for the associated HAV particles. Hollow HAV particles found in the 9-11 day pool banded primarily at a buoyant density of 1.30 g/cm3. HAV in the 14-15 day stool banded bimodally in a CsCl gradient, with antigen peaks at buoyant densities of 1.29 and 1.33 g/cm3. HAV in the days 17, 19, 21 stool pool also banded bimodally in a CsCl gradient; however, the antigen peaks occurred at buoyant densities of 1.33 and 1.40 g/cm3.
mesh_terms: D000818:Animals; D000956:Antigens, Viral / Q000032:analysis; D002499:Centrifugation, Density Gradient; D004195:Disease Models, Animal; D005243:Feces / Q000382:microbiology; D006506:Hepatitis A / Q000382:microbiology*; D006507:Hepatovirus / Q000276:immunology / Q000302:isolation & purification; D002679:Pan troglodytes; D010507:Periodicity
chemical_list: D000956:Antigens, Viral