Bradley D W, McCaustland K A, Schreeder M T, Cook E H, Gravelle C R, Maynard J E
J Med Virol. 1977;1(3):219-26. doi: 10.1002/jmv.1890010309.
Hepatitis A virus (HAV) recovered from stools of human cases of hepatitis A and from stools of chimpanzees experimentally infected with HAV was shown to possess multiple buoyant densities in CsCl gradients. The greatest proportion of HAV was most frequently found at a buoyant density of 1.32-1.34 g/cm3, however, large proportions of HAV were also frequently found at higher densities, including 1.36-1.37, 1.40-1.42, and 1.45-1.48 g/cm3. These findings are consistent with the notion that HAV may be a parvovirus.
从甲型肝炎患者粪便以及实验感染甲型肝炎病毒的黑猩猩粪便中分离出的甲型肝炎病毒（HAV），在氯化铯梯度离心中呈现出多种漂浮密度。甲型肝炎病毒比例最高的部分通常出现在漂浮密度为1.32 - 1.34克/立方厘米处，然而，在更高密度处，包括1.36 - 1.37、1.40 - 1.42和1.45 - 1.48克/立方厘米，也经常发现大量的甲型肝炎病毒。这些发现与甲型肝炎病毒可能是细小病毒这一观点相符。
