<Li> Hepatitis A virus </Li> <P> Hepatovirus A is a species of virus in the order Picornavirales in the family Picornaviridae and is the type species of the genus Hepatovirus . Humans and vertebrates serve as natural hosts . </P> <P> At least 13 additional species of the genus Hepatovirus have now been identified . These species infect bats, rodents, hedgehogs, and shrews . Phylogenetic analysis suggests a rodent origin for Hepatitis A . </P> <P> A species of hepatovirus (Phopivirus) has been isolated from a seal . This species shared a common ancestor with hepatitis A virus about 1800 years ago . </P>

Serum hepatitis is another name for hepatitis a