The results of a laboratory examination of 520 children aged 1—3 years are presented. The examination was conducted to determine the DNA of cytomegalovirus in children with acute cytomegalovirus infection in various biological media by polymerase chain reaction. The differences in the virus shedding  into the blood, saliva, and urine are established: the median of the viral load for saliva is 4.9 lg copies of DNA/ml, the blood 3.4 lg copies of DNA/ml, urine — 3.85 lg copies of DNA/ml. The cut of extreme values of the viral load are determined with the help of mathematical modeling which determine the clinical probability of developing acute CMV infection which allows for more accurate and timely assignment of etiotropic therapy.

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Aim. To study the characteristic features of cytomegalovirus excretion into the blood, saliva and urine of children aged 1-3 years with different forms of infectious process. Materials and methods. There were analyzed the results of observation of 65 children aged 1-3 years with acute cytomegalovirus infection, who received ambulatory treatment and were observed in catamnesis of 6 months. Cytomegalovirus infection markers were determined in blood, saliva and urine serologically (IgM, IgG) and using the method of quantitative PCR. Results. The maximum quantity of virus was found to be determined during the acute form of cytomegalovirus infection in the saliva, exceeding the value of 6.0 lg of CMV DNA copies/ml (median 4.9 lg of CMV DNA copies/ml). In the blood and urine of patients with the acute form of infection, the quantity of virus is within low and mean values of viral load (3.4 lg of CMV DNA copies/ml and 3.85 lg of CMV DNA copies/ml). Six month after the acute form of infection, no CMV DNA was determined in the blood, it decreased to 2.8 lg of CMV DNA copies/ml in the saliva and to 3.0 lg of CMV DNA copies/ml in the urine. Conclusions. Thus, the amount of cytomegalovirus DNA in the biological media of the body such as blood, saliva and urine is maximal during the acute form of disease that can be used as a diagnostic method.

Цель исследования: Обоснование практического применения лабораторных критериев, маркирующих степень тяжести инфекционного мононуклеоза у госпитализированных детей. Материалы и методы. В сравнительном проспективном клиническом исследовании участвовали 54 ребенка, в возрасте от 2 до 13 лет, медиана возраста 5 лет [3,0;8,7]. Основную группу исследования составили 27 детей с тяжелой степенью заболевания, группу сравнения-27 пациентов средней степени тяжести. При сопоставлении данных использовали критерий Манна-Уитни, коэффициент корреляции Спирмена, применяли математическое моделирование. Результаты. Проведенное исследование установило прямую коррелятивную связь степени тяжести инфекционного мононуклеоза и показателей общего и прямого билирубина, r = 0,39. Определены «пороговые» значения: для общего билирубина ≥ 15 мкмоль/л, для прямого ≥ 5,5 мкмоль/л, чувствительность 96%, специфичность 52%. Выводы. Для прогнозирования степени тяжести инфекционного мононуклеоза у госпитализированных детей в первые сутки заболевания можно использовать «пороговые» значения фракций билирубина.

Objective. To study the possibility of using N-terminal pro-BNP fragment as a screening criterion of hemodynamic significant of the functioning arterial duct in extremely premature newborns. Hemodynamically significant functioning arterial duct (HSFAD) is a reason of the development of various complications in extremely premature newborns. The basic method for HSFAD diagnosis is Echo CG. The limited technical abilities of ultrasound devices can prevent from an early diagnosis and timely treatment of this state. The search of additional markers of hemodynamic significance the functioning arterial duct (FAD) is actual. Materials and methods. A continuous prospective observational study included patients aged 1 to 3 days with FAD, gestation period of 2532 weeks and birth weight from 500 to 1500 g. Hemodynamic significance of FAD was determined according to generally accepted Eco CG criteria. The level of NT-pro-BNP was identified with IFA on the third day of life. Mathematical modelling was used to calculate a threshold value of NT-pro-BNP, corresponding to 6500 pg/ml, at which the probability of hemodynamic significance of the functioning arterial duct exceeds 80 %. Results. The assessment of NT-pro BNP concentration on the third day of life permitted to establish the following reliable differences: in the main group, the median concentration for NT-pro BNP was 15000 [IQR 2 587; 26 500] pg/ml, in the comparison group 1920 [IQR 1379; 3467] pg/ml, р = 0.001. Mean force direct correlation, r = 0.52, between Echo CG results and NT-pro-BNP values was stated. Conclusions. The obtained results make it possible to use NT-pro-BNP as a screening criterion of FAD hemodynamic significance in extremely premature newborns.