The current epidemiological characteristics of pathogens of especially dangerous infections abroad and in the Russian Federation are given. The biology of the causative agents of hemorrhagic fevers, as well as their species and subspecies, is especially reflected. The biology and epidemiology of the most common causative agents of hemorrhagic fevers are described in more detail: Dengue, Ebola, Marburg, Lassa, Machupo (Bolivian), Hanin (Argentinean) fever, Rift Valley fever, Omsk, Congo-Crimean, and renal fever their intermediate hosts - mosquitoes and ticks, the options for getting these pathogens into the human body. The most severe and widespread human infections, caused by alpha viruses and flaviviruses, the most severe epidemics in various countries are characterized. The modern systematics and immunopathogenesis of the causative agents of these infections, the features of virological and immunological diagnostics using both classical and modern techniques are presented. The new pathogens of hemorrhagic fevers, which have been fatal in recent years, are described. Given the current tense situation associated with the causative agents of hemorrhagic fevers, measures are proposed that are aimed at preventing the entry of pathogens into the Russian Federation, as well as the algorithm of actions of employees of medical institutions when patients with suspected infection associated with causative agents of especially dangerous infections are admitted.
Abstract. The aim of the study was to evaluate the role of immune status and IFN gene polymorphism in the prediction of the efficacy of chronic hepatitis C antiviral therapy in HIV-infected patients. Eighty HIV-infected patients with hepatitis C were recruited. Antiviral therapy included pegylated interferon-α and ribavirin. Flow cytometry was used to test the immune status; polymerase chain reaction method was used for the IFN gene polymorphisms determination. It was found the significant differences in the immune status and allelic variants combinations of the genes responsible for the formation of an adequate immune and antiviral responses in groups of patients with different response to treatment of hepatitis C. Herewith the effectiveness of hepatitis C treatment in HIV-infected patients is associated with the activation of T-cell immunity. Polymorphisms of interferon gene with other prognostic factors, make it possible to better define the disease prognosis and the treatment efficacy.
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