title: [Observations on the behaviour of anti-HAV antibodies (author's transl)].
abstract: The behaviour of anti-HAV antibodies was studied in the following conditions: a) a sample group of 2645 subjects from a healthy population; b) a group of 32 subjects with previous HB-Ag negative viral hepatitis; c) 12 cases of acute virus A hepatitis; d) a group of 18 anti-HAV positive women at the end of their pregnancies the antibodies were thus also studied in the funicular blood and in the newborn babies. The results showed: a) high reactivity (78%) of the healthy population to anti-HAV's; b) the possibility of an a posteriori diagnosis of virus A hepatitis in the presence of serology, negative for B type hepatitis, and positive for the anti-HAV's but with a titre higher than 1:200; c) the possibility of a serological diagnosis of acute virus A hepatitis in the presence of serology, negative for B type hepatitis and positive for the anti-HAV's with high and progressively increasing titre; d) the possibility of anti-HAV antibodies passing from mother to foetus, and the rapid elimination of the antibodies by the newborn baby within a month of his birth.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000914:Antibodies, Viral / Q000032:analysis*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006506:Hepatitis A / Q000276:immunology*; D006507:Hepatovirus; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D011863:Radioimmunoassay
chemical_list: D000914:Antibodies, Viral
vernacular_title: Osservazioni sul comportamento degli anticorpi anti-HAV.