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The impact of emergent infections on the fetal state.

THE AIM: To study the impact of emergent infections (human herpesvirus type 6) on the fetal state.

MATERIALS AND METHODS: The study involved examination of 90 pregnant women in the 2nd and 3rd trimesters of gestation (Group 1 (25 pregnant) consisted of patients with a viral infection, CMV carriers, Group 2 (25 pregnant) included women with a viral infection, herpes simplex virus types 1/2, Group 3 amounted for 20 patients with a viral infection, herpes simplex virus type 6, Group 4 comprised 20 patients with normal pregnancy and no signs of infection. Concentration of IgM and IgG to herpes simplex virus types 1/2, IgM and IgG to herpesvirus type 6 in venous blood of the pregnant was determined by enzyme-immunoassay. Giant cells typical for CMV were determined by cytological examination of saliva sediment. All the pregnant underwent ultrasound somatogenetic examination, Doppler evaluation of maternal-placental-fetal hemodynamics and biophysical profile (BPP) assessment. Results and their discussion: Ultrasound examination of Group 1, 2 and 3 pregnant showed signs of intrauterine infection. Pregnant women with a viral infection were found to have intrauterine growth retardation (IUGR) and Group 3 patients more commonly had symmetrical 3rd degree IUGR. BPP indices showed initial signs of fetal distress in 5 (20%) Group 1 pregnant, 7 (27%) Group 2 pregnant and 11 (55%) Group 3 pregnant women. Doppler examination of uterine-feto-placental hemodynamics revealed a more pronounced increase in vascular resistance indices in Group 3 patients.

CONCLUSIONS: Emergent infections (herpesvirus type 6) of pregnant trigger more pronounced changes in the feto-placental system than other viral infections. Herpesvirus type 6 is a common cause of fetal state deterioration, which manifests in intrauterine growth retardation, changes in biophysical profile and hemodynamic disorders in the mother-placenta-fetus system.

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