Serum hepatitis A antigen

Hepatitis A antigen is a substance that can always induce the production of hepatitis A antibodies in the body. Hepatitis A virus (HAV) is an icosahedral three-dimensionally symmetrical spherical particle with a diameter of 27 to 32 nm, without an envelope, and the core is a single-stranded positive-stranded RNA. HAV is a member of the Hepatovirus or Heparnavirus of the Picornaviridae family. HAV is mainly transmitted through the hand-to-mouth route, with an incubation period of 15-50 days, with an average of 28 days. The virus usually exists in the blood and feces of patients 5 to 6 days before the serum ALT increases. Two to three weeks after the onset, with the production of specific antibodies in the serum, the infectivity of serum and feces gradually disappeared. The laboratory diagnosis of HAV allows antigen detection.