Enzyme-linked immunosorbent assay for acute adenovirus infection.
An enzyme-linked immunosorbent assay (ELISA) is described for demonstrating antibodies to the hexone antigen of adenoviruses. The antigen-coated, flat-bottomed microtiter plates are incubated sequentially with dilutions of patients' sera (2 h at 37 degrees C) and peroxidase-coupled anti-human IgG (2 h at 37 degrees C). After a final washing, orthophenylenediamine is added to the plates, and the absorbance (A) measured 30 min later. The ELISA was found to be a hundred-fold more sensitive than complement fixation. An evaluation methods for determining antibody concentration is described which correlates the absorbance of sera diluted 10(-3) to the absorbance of a reference serum containing an arbitrary value (100) of antibody. This methods avoids titration of sera and day-to-day assay variations by different background reactions. A significant increase in antibody concentration of acute-phase serum over that of convalescent phase serum is observed. The ability to test sera in a single dilution and the automatic reading of results and their evaluation by computer make this assay suitable for diagnostic laboratories.
D000257:Adenoviridae Infections / Q000175:diagnosis*; D000260:Adenoviruses, Human / Q000276:immunology*; D000914:Antibodies, Viral / Q000032:analysis*; D002213:Capsid / Q000276:immunology*; D036022:Capsid Proteins; D003168:Complement Fixation Tests; D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D009500:Neutralization Tests; D014764:Viral Proteins / Q000276:immunology*
D000914:Antibodies, Viral; D036022:Capsid Proteins; D014764:Viral Proteins; C018315:hexon capsid protein, Adenovirus