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Concentrating properties of a new adsorbent, active aluminum oxide, towards poliomyelitis virus type III and simian rotavirus are studied using virus contamination of sewage and drinking water. Optimal concentrations of the adsorbent for effective adsorption of both rota- and polioviruses are established (1.5 and 1 g/liter, respectively) at pH typical of sewage and drinking water (7.0-8.5), as well as the optimal time of virus contact with the adsorbent (30 min). Elution conditions are determined: 3% elution agent beef extract and pH 8.5-9.5 are optimal for both viruses. Active aluminum oxide is recommended as an adsorbent for elimination of enteroviruses from water objects.

Microtopographical interrelations of the posterior cranial fossa structures in the presence of cholesteatoma were studied up intraoperatively in 36 cases and while the pathomorphological investigation conduction in 6 sectional observations. Cholesteatoma mostly localizes in cerebellopontile angle and more rarely--in the IV ventricle with craniospinal spreading. It is the tumor's capsule texture what causes dense adherence of cholesteatoma with surrounding cranial nerves, vessels, incorporated frequently in her structure together with underlying cerebral substance.

The microsurgical anatomy peculiarities of a large size tumor of n. vestibulocochlearis (NVC) were studied, basing on intraoperative (in 380 patients) and sectional (30) observations data. The distinguishing of three main anatomic-topographical variants of a large size NVC tumor growth has great significance for elaboration of the microsurgical tumoral excision method.

The postoperative period course and an autopsy data of 68 patients operated on for n. vestibulocochlearis neurinoma, parasternal meningioma, cholesteatoma. Principal damaging factors and cerebral stem functional disorders are assigned.

The information acquisition, decision-making and control system must be the basic tool for optimizing the information procedures in the interests of sanitary-epidemiological welfare of troops. It's necessary to make a thorough revision of the existing account and record documentation in order to study its value. Each pattern of record cards must be scientifically substantiated depending on its effectiveness for further decision making. It's necessary to exclude all futile information. Record and account procedures must be automated and computerized throughout all chains of command beginning from a single military unit. Special systems must be developed for this matter. Realization of these goals will completely assure the monitoring of health status indices of servicemen and the environmental situation, as well as monitoring of risk factors influence upon the health of personnel.

Experimental and clinical studies showed a number of virus infections to be accompanied by lipidemic disorders. Experimentally, dyslipidemias were found in tick-borne encephalitis (TBE) in mice, rotavirus infection in rabbits, and amyotrophic leukospongiosis in guinea pigs. The possibility of correcting the virus-induced lipidemic disorders with an antiviral drug, lincomycin, was demonstrated in TBE in mice. Dynamic study of the lipidemic status of patients with virus hepatitis A revealed marked dyslipidemia of the atherogenic type which was stable and persisted up to the time of clinical recovery. The data obtained supplement the current concepts concerning the pathogenesis of virus infections.

On the material of 107 intraoperative and 19 section specimens, a topographic anatomy of meningiomas of the posterior cranial fossa was studied. The groups of tumours were distinguished, depending on location of primary meningioma and direction of its growth. Tumour interrelations with the caudal cranial nerves and surrounding vessels were studied.

The large immune stratum and intense collective immunity to virus hepatitis A among the urban population of Byelorussia are characteristic of hyperendemic territory. The geometric mean of the antibody titer has been noted to increase with age, which is probably due to repeated infections of persons who have already had the disease. The use of this value for the characterization of collective immunity and epidemiological situation has been proposed.

The spread of hepatitis A in children's institution occurred through everyday contacts, the boundaries of the focus of infection embraced the whole institution, and the active detection of the prevailing subclinical forms of the disease proved to be possible by means of virological and biomedical tests. The enhancement of the effectiveness of clinical and epidemiological surveillance by its orientation to the control of the spread of this infection through water and everyday contacts, the rational organization of sanitary, microbiological and serological studies, the development of criteria of epidemiological safety of children's institutions is proposed.

The pathogenic, infectious, and immunogenic properties of vaccinia virus were studied in various species of small laboratory animals (mice of different ages, Syrian hamsters, guinea pigs, white and cotton rats, rabbits). Cotton rats were found to be most susceptible to the infection. Vaccinia virus in this species causes an acute, frequently lethal infection. The inoculated virus intensively accumulated in parenchymatous organs, and this was accompanied by a marked rise of hemagglutinating and virus-neutralizing antibody levels.

The possibility of using monkey red blood cells conserved by freezing at --196 degrees C in serological tests was studied. Hemagglutination and hemagglutination-inhibition tests with measles antigen and measles gamma globulin revealed no differences in the sensitivity of native and conserved red blood cells. The method of washing red blood cells from cryoprotective solution modified by the authors is described.