title: A new particulate antigen present in serum.
abstract: A new antigen has been encountered in the serum of 10 blood donors. It is distinct from Australia antigen, consists of spherical particles 21-23 nm in diameter and the corresponding antibody is widely distributed in the population.
mesh_terms: D000293:Adolescent; D000818:Animals; D000914:Antibodies, Viral / Q000032:analysis; D000956:Antigens, Viral / Q000032:analysis; D002648:Child; D002675:Child, Preschool; D006224:Cricetinae; D005289:Ferrets / Q000276:immunology; D006801:Humans; D007223:Infant; D008253:Macaca mulatta / Q000276:immunology; D051379:Mice; D011200:Poultry / Q000276:immunology; D051381:Rats
chemical_list: D000914:Antibodies, Viral; D000956:Antigens, Viral