{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T08:13:07Z","timestamp":1760170387700},"reference-count":30,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2005,12,6]],"date-time":"2005-12-06T00:00:00Z","timestamp":1133827200000},"content-version":"vor","delay-in-days":9105,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Medical Virology"],"published-print":{"date-parts":[[1981,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>A radioimmunoassay (RIA) using polystyrene beads as the solid phase for cytomegalovirus (CMV) antigen and iodinated immunosorbent purified anti\u2010human IgG, IgM, and IgA as indicator antibodies was developed for the detection of immunoglobulin class\u2010specific antibodies to CMV. An antigen prepared from extracellular virus was essential for reliable results, and a preparation ultracentrifuged and sonicated twice was better than a crude antigen. The optimal antigen gave low cpm values with a negative reference serum, resulting in cpm ratios of 10 or higher between early convalescent phase serum and negative reference serum.<\/jats:p><jats:p>Of six patients with an increase in CMV CF titres, all six had an increase in RIA IgG titres, four had an increase in IgA titres, and all had IgM antibodies. The IgG titres were high, up to 1\/64,000. In a group of 17 infants negative in CMV CF test, 14 had CMV IgG antibodies in RIA test, indicating mainly low levels of maternal antibodies. In six of seven patients with CMV isolations from urine specimens, an increase in IgG or IgA titres or the presence of IgM antibodies was found, and only one of these patients had an increase in CMV CF titre. The specificity of the developed CMV RIA test was further demonstrated by detecting no significant increase in RIA titres in serum specimens of patients with primary herpes simplex infection, chickenpox, herpes zoster, or infectious mononucleosis.<\/jats:p>","DOI":"10.1002\/jmv.1890070202","type":"journal-article","created":{"date-parts":[[2007,3,2]],"date-time":"2007-03-02T10:43:33Z","timestamp":1172832213000},"page":"85-96","source":"Crossref","is-referenced-by-count":18,"title":["Solid\u2010Phase Radioimmunoassay of Serum IgG, IgM, and IgA Antibodies to Cytomegalovirus"],"prefix":"10.1002","volume":"7","author":[{"given":"Einar 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