Human osteogenic sarcoma cell line and use thereof for immunofluorescent antibody test

Claim 1

A test procedure for determining the presence of human cytomegalovirus (HCMV) antibody in a sample of human blood which comprises substantially uniformly distributing on a surface as target cells a human osteogenic sarcoma cell line designated ATCC Accession Number CRL 8069 and characterized by an unlimited life span, by being chronically and persistently infected with HCMV, and by showing a substantially constant ratio between cells infected with HCMV and non-infected cells, the percentage of infected cells comprising from about 1 to about 10 percent of the total cells, inoculating said target cells with a diluted sample of blood serum to be tested for the presence of HCMV antibody, contacting the cells with a fluorescein isothiocyanate conjugated immunoglobulin, and optically viewing said cells to determine the presence of immunofluorescent positive cells resulting from reaction between cell antigens and test serum antibodies.