hepatitis B surface antigen
- hepatitis B surface antigen
hepatitis B surface antigen n an antigen that is usu. a surface particle from the hepatitis B virus and that is found in the sera esp. of patients with hepatitis B
abbr. HBsAg called also Australia antigen
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(HBsAg) a coat protein antigen of the hepatitis B virus present on complete virions (Dane particles) and smaller spherical and filamentous particles circulating in the blood of individuals with active or chronic infections, being first detectable several weeks prior to clinical disease and peaking with the appearance of symptoms. Anti-HBs antibodies appear in the blood in late convalescence and are protective against reinfection. See also hepatitis B vaccine (recombinant), under vaccine.
Medical dictionary.
2011.
Look at other dictionaries:
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