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Journal of Clinical Microbiology, December 1998, p. 3540-3544, Vol. 36, No. 12
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Prenatal Diagnosis of Congenital Cytomegalovirus Infection

T. Lazzarotto,1 B. Guerra,2 P. Spezzacatena,1 S. Varani,1 L. Gabrielli,1 P. Pradelli,1 F. Rumpianesi,1 C. Banzi,2 L. Bovicelli,2 and M. P. Landini1,*

Department of Clinical and Experimental Medicine, Section of Microbiology,1 and Second Department of Obstetrics and Gynecology,2 Medical School, University of Bologna, Bologna, Italy

Received 21 May 1998/Returned for modification 1 July 1998/Accepted 1 September 1998

We report here the results of a study on the prenatal diagnosis of congenital cytomegalovirus (CMV) infection. The study was carried out by both PCR and virus isolation from amniotic fluid (AF) for 82 pregnant women at risk of transmitting CMV for the detection of (i) seroconversion to CMV immunoglobulin G (IgG) positivity during the first trimester of pregnancy, (ii) symptomatic CMV infection in the mother during the first trimester of pregnancy or intrauterine growth retardation detected by ultrasound or abnormal ultrasonographic findings suggestive of fetal infections, and (iii) seropositivity for CMV-specific IgM. For 50 women, fetal blood (FB) was also obtained and tests for antigenemia and PCR were performed. The results indicate that AF is better than FB for the prenatal diagnosis of CMV infection. PCR with AF has a sensitivity (SNS) of 100%, a specificity (SPE) of 83.3%, a positive predictive value (PPV) of 40%, and a negative predictive value (NPV) of 100%; rapid virus isolation with the same material has an SNS of 50%, an SPE of 100%, a PPV of 100%, and an NPV of 94.7%. Fewer than 10% of the women positive for IgM by enzyme immunoassay (EIA) had a congenitally infected fetus or newborn infant. When EIA IgM positivity was confirmed by Western blotting (WB) and the WB profile was considered, the percent transmission detected among women with an "at-risk" profile was higher than that observed among IgM-positive women and was the same as that among women who seroconverted during the first trimester of pregnancy (transmission rates of 29 and 25%, respectively).

* Corresponding author. Mailing address: Dipartimento di Medicina Clinica Specialistica e Sperimentale, Sezione di Microbiologia, Policlinico S. Orsola, Via Massarenti 9, 40138 Bologna, Italy. Phone: 39.051.341652. Fax: 39.051.341632. E-mail: viroland{at}med.unibo.it.

Journal of Clinical Microbiology, December 1998, p. 3540-3544, Vol. 36, No. 12
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


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