Prediction of prolonged course of infectious mononucleosis in children on the basis of structural organization of lymphocytes of blood

Objectives. The article presents the results of research on the definition of criteria for predicting the adverse course of infectious mononucleosis (IM) in children on the basis of the structural organization of lymphocytes of blood. Materials and methods. There were 68 children aged three to fifteen years suffering from IM under supervision. The diagnosis of IM was verified by PCR (detection of EBV DNA in the blood) and ELISA (anti-EBV Ig M and Ig G). The biophysical organization of the cytoplasmic membrane of lymphocytes was determined by the method of electron paramagnetic resonance (EPR) of spin probes using the method of additional broadening at microwave parameters 9.39 gHz, amplitude of high-frequency modulation 1 gauge, magnetic field scan time 200 sec, time constants 0.1 milliseconds (ms). Microviscosity of the intracellular environment of lymphocytes was determined by the mobility parameter of a water-soluble probe (nickel ferricyanide), which easily penetrates into the cytoplasm and in combination with extracellular paramagnetic ions, allows to evaluate the microviscosity of intracellular contents in relative units (r.u.). Results. According to the results of observations, it is established that at the stages of manifestation of the disease there are pronounced violations of the biophysical organization of the structure of lymphocytes in the form of a decrease of viscosity and elastic properties of intracellular content and cytoplasmic membrane of lymphocytes. It was characterized by the fact that the average values of the penetration rate of the electron paramagnetic resonance of the spin probe (PR EPR s.p) in patients of both groups were significantly higher than the normative ones. In the group with smooth course, they exceeded the norm by 1.5 times, and in patients with prolonged course by 1.8 times, and the values of the microviscosity of intracellular contents (MIC) were significantly reduced compared to the control - by 22.1% in patients with a smooth course of the disease and 25.1% - with a prolonged course of IM. Conclusions. In patients with prolonged course of IM these disorders were more pronounced than in the smooth course of the disease. In the period of convalescence, the indicators of the biophysical organization of the structure of lymphocytes of patients with a smooth course of IM did not differ from the norm, and in patients with a prolonged course of the disease, their reliable deviation was revealed.