[Safety research of a vaccine preparation in hepatitis A derived from the MB-7 rapidly growing strain].

A study was undertaken to prove that a vaccine drug based on the fast-growing MB-7 (MB-7 VD) of hepatitis A virus (HAV) is safe. It was established that MB-7 VD, when once injected to white outbred mice and when 4 times injected to Hartley guineas pigs, did not cause any hematological and biochemical changes in the peripheral blood or in the condition of the central nervous system of experimental animals, which shows that MB-7 VD is free of any toxic properties.

[Immunological safety and sensitizing effect of an MB-7-based vaccine against hepatitis A].

The influence of a vaccine based on the MB-7 strain of hepatitis A virus (VP-MB-7) designed at the "Vector" Center of Virology and Biotechnology was studied. VP-MB-7 was found to provoke no allergic response and to have an activating effect on the specific and non-specific responses of cell and humoral immunity similar to those evoked by hepatitis A vaccine "Hep-A-in Vac".

[Comparative study of the reactivity, safety and immunogenicity of "Havrix" inactivated hepatitis A vaccine].

This paper sums up the results of controlled field clinical trials of adult and childhood variants of Harvix, inactivated vaccine from hepatitis A. The vaccine is weakly reactogenic and safe. After a single injection of Harvix-1440 vaccine to adults the percentage of seroconversions in previously seronegative individuals was 80.

[Isolation and characteristics of anti-adenovirus monoclonal antibodies in immunoenzyme and immunofluorescent reactions].

New monoclonal antibodies (MAbs) to adenovirus hexon, highly active in ELISA and immunofluorescent analysis, were prepared. According to competitive ELISA, new MAbs differed in their blocking activity and were directed to 2 different hexon epitopes. MAb 3H8 did not modify antigen binding of the rest MAbs labeled with peroxidase (PAb x Pox), and none of unlabeled MAbs suppressed the reaction of MAb x Pox 3H8.

[Mechanisms for the therapeutic effect of herpes polyvaccines in chronic ophthalmic herpes and genital herpes].

Commercial inactivated culture polyvaccine against herpes simplex viruses (types 1 and 2) developed at D. I. Ivanovsky Institute of Virology promoted cessation of viremia.

[The effect of plasmapheresis on the rheological properties of the blood in patients with thrombosis of the central retinal vein].

Central retinal vein occlusion is one of the most frequently encountered vascular affections of the retina. In spite of this its management is still a matter of debate. Histopathological findings have prompted us to conduct a study in patients presenting with central retinal vein occlusion (n = 63).

[Characteristics of reactogenic and immunogenic properties of the children's variant of the domestic vaccine, "Gep-A-in-Vak", against hepatitis A].

Russian cultural concentrated inactivated vaccine protecting from hepatitis A--Hep-A-in-vac was used for immunization of children. The vaccine is slightly reactogenic and completely safe in children aged 3-17 years vaccinated twice in a dose of 0.25 ml.

[Evaluation of the effectiveness of substance for diagnosing rotaviral infection under field conditions].

A universal mathematical approach (algorithm) to assessment of the efficacy of new preparations for the diagnosis of rotavirus infection, analysis and processing of the results involves assessment of the detection rate of infection, specificity of preparations, probability of positive and negative diagnoses, total index of coincidence of results of diagnosis with the reference method, and chi 2 and phi2 coefficients indicating the reliability of relation to the reference method and the strength of this relation. Diatest software is proposed for accelerating statistical processing of the results. Use of the algorithm and software permits assessing the efficacy of diagnostic agents for rotavirus and other infections.

[Development of sera reference panels for quality control of ELISA diagnostic kits in Russia].

In the past 5 years, the investigators of the "VECTOR" SRB VB and the L.A. Tarasevich State Institute of Standardization and Control of Medical Biological Preparations have jointly designed sera reference panels containing anti-HIV-1 IgG, anti-HCV IgG, and anti-HAV IgM which have been approved as national standard panels.

[Hep-A-in-Vac, a Russian cultured concentrated inactivated vaccine against hepatitis A].

The results of the study of the reactogenicity, safety and immunological activity of Russian cultural vaccine against hepatitis A are presented. The vaccine was found to have specific safety, moderate reactogenicity and pronounced immunological activity. In addition, the study of the prophylactic efficiency of the vaccine in the pre-epidemic period of the outbreak of hepatitis A morbidity in a group exceeding 14,000 adults was carried out.

[Comparative study of the immunogenicity of the inactivated hepatitis A vaccine Hep-A-in-vac from experimental and clinical data].

Comparative analysis of the specific activities of various batches of Hep-A-in-Vac vaccine showed that the immunologic efficacy of the agent directly depended on the content of hepatitis A virus antigen in the vaccine dose. The results of studying the immunogenicity of the agent on volunteers are compatible with the results of experimental studies and indicate that the test of guinea pigs adequately assesses this characteristic. Assessment of the immunogenic properties of Hep-A-in-Vac prepared using improved technology indicates that Russian vaccine injected three times in a dose containing at least 40 U EIA ensures 87.

[Evaluation of reactivity and immunogenicity of a cultured concentrated inactivated vaccine against hepatitis A "Hep-A-In-Vak"].

Clinical trials of inactivated hepatitis A vaccine Hep-A-in-Vac demonstrated its specific safety and moderate reactogenicity, manifesting by short-term fibrillar twitching of musculus deltoideus at the site of injection. After a course of three immunizations 87.5% seronegative vaccines developed a high level of specific antibodies to hepatitis A virus with at least 100 reverse values of titers.

[Optimization of preparation conditions of an inactivated hepatitis A vaccine and its characteristics].

Modernization of the protocol and optimization of the technology of preparation of inactivated hepatitis A vaccine helped prepare the experimental lots of inactivated vaccine meeting all the requirements to such preparations and the WHO recommendations.

[The use of the autocoagulation test for the detection of coagulopathies in rheumatoid arthritis].

The parameters of plasma-platelet component of hemostasis were studied by autocoagulation test in 90 patients with rheumatoid arthritis of varying activity. To specify the role of blood platelets, their counts were estimated, as was their functional activity. Plasma coagulating activity was found elevated and anticoagulating activity reduced in disease of the first and second degrees of activity, particularly so in the second degree.

[The isolation and study of the characteristics of a cytopathic strain of the hepatitis A virus].

A fast-growing cytopathic isolate of human hepatitis A virus (strain MB-7) was derived from fecal samples of infected patients and adapted to growth in FRhK-4 cell culture. A positive serum standard against HAV and electron microscopy were used to demonstrate that MB-7 belonged to human hepatitis A virus. The strain MB-7 induced plaque formation in FRhK-4 under agar overlay after 10-12 days of incubation.

[Coagulation and fibrinolytic activity of erythrocytes in varying stages of rheumatic fever with minimal activity].

Lowered, as compared to the normal, coagulation activity of hemolyzed and intact red blood cells was recorded in rheumatic fever patients with minimal activity of the process in the presence of hypercoagulation syndrome detectable in the plasma. This activity is low-dependent on the degree of chronic circulatory insufficiency (CCI), and has a tendency to further lowering but not rising under the effect of the treatment conducted. Aggregation activity of red blood cells in patients with CCI of 0-I degree is lowered, in those with CCI of IIA and IIB-III degree--elevated, and it is highest in patients with CCI of IIB-III degree.

[The results of a controlled field trial of a dried erythrocytic immunoglobulin diagnostic agent for detecting the hepatitis A virus antigen].

The results of the controlled field trial of lyophilized erythrocytic immunoglobulin diagnosticum for the detection of hepatitis A virus antigen in the urine and feces of patients are presented. This diagnosticum was used for the study of urine and fecal samples from 225 patients (of these, 176 had hepatitis A) and 54 healthy persons in the passive hemagglutination (PHA) test. Their blood sera were studied in the PHA test (to detect HBsAg) and the radioimmunoassay (to detect anti-HAV IgM).

[A comparative study of the sensitivity and specific activity of an immunoenzyme test system for determining class-M antibodies to the hepatitis A virus].

The diagnostic value of the first experimental production batches of assay kit "DIAGN-A-HEP", produced at the Institute of Poliomyelitis and Viral Encephalitides (USSR Acad. Med. Sci.

[The anticoagulant therapy of patients with dilated cardiomyopathy].

Complex treatment with direct and indirect anticoagulants and deaggregants carried out in 41 patients with dilated cardiomyopathy produces a significant positive effect on the condition of plasma hemostasis allowing to control the signs of hypercoagulation changes of the general coagulation, fibrinogen-like and antiheparin activity leading to normalization of fibrinolysis of the euglobulin plasma fraction. Prolonged intake of indirect anticoagulants furthers reduction of development of thromboembolism by 12.1%.

[Characteristics of blood coagulation changes in patients with dilated cardiomyopathy].

The main indices of the coagulogram, fibrinolysis and adhesive-aggregational properties of thrombocytes were evaluated in 40 patients with dilated cardiomyopathy with the purpose of determining the pathogenetic factors of thrombogenesis. Hypo- and hypercoagulation changes were found as well a reduction of the number of thrombocytes while the adhesiveness index remained unchanged; the aggregation and deaggregation capacities of thrombocytes reduced, the general fibrinolytic plasma activity increased.

[Comparative study of a diagnostic agent for detecting the antigen of the hepatitis A virus: dried erythrocyte immunoglobulin].

The results of the trials of dried erythrocyte immunoglobulin immunodiagnosticum for the detection of hepatitis A virus antigen, developed by a group of scientists at the Tashkent Research Institute for Vaccines and Sera, are presented. The immunodiagnosticum is specific to hepatitis A virus antigen and suitable for the detection of this antigen in fecal and urine samples from patients with viral hepatitis A in the acute stage of the disease.

[Immune status of subjects inoculated with inactivated influenza vaccines].

Inactivated whole-virion and split-virion influenza vaccines adsorbed on aluminium hydroxide did not suppress the immune system of the vaccinees. Immunization with these vaccine preparations induced the formation of both cell-mediated and humoral immunity in over 60% of the vaccinees.