Abstract
Nasopharyngeal (NP) washes from 12 patients experimentally infected with influenza A/Victoria/3/75 wild-type virus were tested in 2 newly developed enzyme-immunoassay (EIA) systems. Results were compared with infectivity titres of the NP wash specimens in rhesus monkey kidney-tissue culture. EIA detected A/Victoria/3/75 hæmagglutinin antigen for more days than did culture. EIA is also rapid and easy to do in large numbers; hence it may have advantages over culture methods for the diagnosis of influenza infections and the investigation of influenza epidemiology.
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