title: Assessment of virus infectivity by the immunofluorescent and immunoperoxidase techniques.
abstract: The immunofluorescent and immunoperoxidase cell-counting techniques were comparable in precision and reproducibility for the quantitative assessment of influenza virus infectivity. The dose-response function was linear with each procedure, and comparable results were obtained for estimating neutralizing antibodies in antiviral serum.
mesh_terms: D000914:Antibodies, Viral / Q000032:analysis; D000956:Antigens, Viral / Q000032:analysis; D002460:Cell Line; D005069:Evaluation Studies as Topic; D005455:Fluorescent Antibody Technique; D009500:Neutralization Tests; D009975:Orthomyxoviridae / Q000276:immunology / Q000472:pathogenicity*; D010544:Peroxidases / Q000276:immunology*
chemical_list: D000914:Antibodies, Viral; D000956:Antigens, Viral; D010544:Peroxidases