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This article is devoted to the probleme of modern Pediatrics pathology of the immune system in children with complicated viral infections. The aim of this study was to investigate the immune and cytokine status in children with complicated acute respiratory viral infections. The study included 100 children are often ill respiratory virus infections (more than 8 times per year) from age 0 to 7 years, and 30 children with upper respiratory tract infection; no more than 1 time per year-the control group. The standards of indicators developed by the staff of Immunological laboratory Diagnostic center of the Ministry of health of Republic Sakha (Yakutia ) together with the Institute of health of the Republic Sakha (Yakutia). Statistical calculations made on the basis of applied programs "SAS"and "SPSS"In the analysis of contingency tables (estimates of the correlation of the characteristic and evaluation of significance of differences between groups) used the criterion of 2 (Pearson and likelihood ratio and Fisher's exact test. Comparison of mean values was performed univariate analysis of variance using T-student criterion for assessing the equality of mean F-Fisher test to assess equality of variance. Extreme climatic conditions ofthe far North have an impact on immunological mechanisms. In the analysis of changes ofthe immune status revealed the greatest decline in T-cell level and components of complement in children with complications of viral respiratory infections. In children with complicated respiratory viral infections reduced cellular immunity (CD3+, CD41, CD81, CD+, CD 22+). In children with complicated respiratory viral infections decrease levels ofcytokines (IFN-y FN0-d), indicating about the risk of the formation of complications of respiratory viral infections. As a result of drug therapy of broncho-vaxom marked improvement in immune status and the absence of recurrence of respiratory viral infections within the next 3 months after therapy.

Respiratory tract infections and pyodermia are typical for personnel doing military service under conscription. Risk of progression of these infections is connected with activation of carry-over of causative agents among military personnel during replacement and decrease in immunity of conscripts. Usage of medication "Karmolis Kapli" for the purpose of prophylaxis allows to reduce cases of respiratory tract infections among the military personnel. Among the military servicemen who had take "Karmolis Kapli" was noted reduction of community-acquired pneumonia, tonsillitis and pyodermia morbidity. Non-specific protective effect of medication "Karmolis Kapli" is conditioned by increase of the common resistance of the body. For the purpose of prophylaxis it is necessary to use this medication during the personnel formation before the beginning of seasonal morbidity.

The objective of the present study was to estimate the influence of halotherapy performed in a specialized salt room on the health status of the children frequently ill with acute respiratory diseases. The application of halotherapy was shown to produce well-apparent antiinflammatory, draining, and sanogenic effects. Observations during 1, 3, 5, and 12 month follow-up periods confirmed the persistence of prophylactic and therapeutic effects of salt therapy. The results of the study were used to develop differential schemes of halotherapy taking into consideration the initial conditions of the children.

We have investigated efficacy of meglumine acridonacetate (Cycloferon) infrequently sick children (FSC) on the basis of serum proteomic profile dynamics; we have also studied epidemiologic efficacy of interferon inductor as a mean of non-specific immunoprophylaxis. FSC were subjects to follow up during 4-10 years. We have used recommended regimens of drug administration. Were analyzed: anamneses of FSC, clinical symptoms, infectious index calculation, stratification of children into 5 groups of FSC and separation of children with truly frequent recurrent respiratory viral diseases. On the basis of proteomic blood analyzes the following parameters of efficacy of treatment with meglumine acridonacetate were defined: expression intensity of Rho- and Ras-signaling pathways proteins. Epidemiologic efficacy of the drug was 2,9 (from 2,4 to 3,4), rate of protection--62,8% (58,5-67,1%).

Aim: Assessment of results of immunization against measles and mumps in children with recurrent respiratory infections., Materials and Methods: Levels of IgG against measles and mumps viruses were measured using enzyme immunoassay. Two hundred and twelve serum samples obtained from 6 groups of children with 20 - 45 persons (boys and girls) in each were tested. Children of various ages were presented in each group. Also, immunologic parameters were measured in all children., Results: It was established that mean antibody titers to measles and mumps viruses did not change during 10 years. In more than 50% of children correlation between high and low titers of antibodies of different specificity was found., Conclusion: Recurrent respiratory illnesses determine complex regulation of transition of memory cells into cells secreting antibodies to measles and mumps viruses.

The role and influence of Chlamydia trachomatis on the development and course of acute respiratory virus infections (ARVI) in 130 children admitted to the hospital of the Research Institute of Children's Infections (St. Petersburg) was studied. The occurrence of respiratory Chlamydia infections in ARVI patients with an unfavorable premorbid background was 35-36%. The disease took its course simultaneously with the mixed infection of the respiratory tract with viruses, pneumococci and their associations with staphylococci and Haemophilus influenzae. Chlamydia infection in children had no influence on the character of the clinical manifestation of ARVI with the exception of the obstruction syndrome which was constantly observed in children with ARVI (p < 0.001).

Materials on the etiological structure of acute respiratory diseases (ARD) and the spread of respiratory virus infection among the population of the city under the conditions of mass vaccinal prophylaxis and chemoprophylaxis are presented. These materials indicate that the proportion of influenza A virus in the etiological structure of ARD decreased by half as the result of introducing the complex system of influenza control in the city. The proportion of other causative agents of ARD before and after introducing the complex system of influenza control irregularly varied among different age groups of the population without statistical significance. The indices characterizing the spread of influenza A virus infection among the population of the whole city were found to be significantly decreased during the second period of observation.