Rapid increase in the serum Cytomegalovirus IgG avidity index in women with a congenitally infected fetus |
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| Affiliation: | 1. Division of Paediatric Surgery, Department of Surgery, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China;2. Division of Liver Transplantation, Department of Surgery, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China;3. Division of Plastic and Reconstructive Surgery, Department of Surgery, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China;1. Department of Chemical and Geological Sciences, University of Cagliari, Cagliari I-09042, Italy;2. Department of Surgical Sciences, University of Cagliari and Neonatal Intensive Care Unit, Puericulture Institute and Neonatal Section, Azienda Ospedaliera Universitaria, Cagliari I-09042, Italy;3. Department of Public Health Clinical and Molecular Medicine, University of Cagliari, Cagliari I-09042, Italy;4. Laboratory Medicine Service, IRCCS AOU San Martino-IST, University-Hospital, Genoa, Italy;5. CDS Creative Data Solutions, Ballwin, MO, USA;6. Molecular Virology Unit, Microbiology and VirologyDepartment, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Policlinico San Matteo, Pavia, Italy;7. Departments of Obstetrics and Gynecology, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Policlinico San Matteo, Pavia, Italy |
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| Abstract: | BackgroundHuman Cytomegalovirus (CMV) is the virus most frequently responsible for severe diseases of the fetus and newborn. The reported intrauterine transmission rate of CMV following primary maternal infection is approximately 40%. Invasive techniques are needed for the prenatal diagnosis of congenital CMV infection.ObjectivesThe aim of this study was to evaluate whether the rapidity of change in the CMV IgG avidity index (AI) is associated with the presence of congenital CMV infection among mothers with suspected primary CMV infection.Study designThe serum CMV IgG AI was repeatedly measured in 17 pregnant women with positive or borderline test results for CMV IgM together with an initial IgG AI value of <40%. Their neonates underwent polymerase chain reaction analyses for the presence of CMV DNA in the urine. The rapidity of change in the IgG AI per 4 weeks was defined as the ΔAI (%). The ΔAI of women with congenital CMV infection was compared with that of women with no infection.ResultsThe ΔAI of nine mothers with congenital CMV infection (median,15.7%; range,7.8–42.8%) was significantly higher than that of eight mothers with no infection (median, 6.5%, range, 2.0–8.8%; p < 0.001). The incidences of congenital CMV infection were 100.0%, 16.7%, and 0.0% among mothers with a ΔAI of >10, 5–10, and <5%, respectively.ConclusionsMeasurement of the ΔAI in pregnant women might be useful for estimating the risk of mother-to-neonate CMV transmission. |
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| Keywords: | Congenital infection Cytomegalovirus IgG avidity |
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