Spread Dynamics of Leucosis in Cattle in Livestock Farms of the Russian Federation for 2000–2018

Leucosis occupies a leading position in the modern nosological structure of cattle infectious diseases. This is due to the high infection of livestock and large economic damage in affected farms [1–3]. Leucosis is a chronic tumor disease caused by an RNA-containing virus of the Retroviridae family. The disease is characterized by uncontrolled reproduction of immature hematopoietic cells [4, 5]. The objective is to assess in dynamics the indicators of cattle infection with the leucosis virus and the incidence of leucosis in farms of all categories of the Russian Federation in the period of 2000–2018. The data of the analysis of the epizootic situation for leucosis in cattle in farms of all categories of the Russian Federation for 2000-2018 are presented. Over this period of time, the number of diagnostic serological studies in the immunodiffusion reaction increased 1.88 times in all subjects. According to the results of epizootological monitoring in farms of all categories of the Russian Federation, the rates of infection of the bovine leucosis virus decreased 1.89 times, the incidence rates decreased 2.02 times. At present, the epizootic situation has improved markedly, but so far there are problems with incomplete release of farms from leucosis in cattle. It is necessary to continue work on the elimination of this dangerous chronic disease in farms of all categories in the territory of the Russian Federation

Synthesis and investigation of optical properties of controlled interferential structures based on vanadium dioxide

The aim to be attained is to establish correlations between optical parameters of structures and conditions of their vacuum synthesis, increase diffraction efficiency and fast response of reversed optical memory based on these structures. The analytical link between the measured optical parameters of structures of their diffraction efficiency has been obtained. The derived formula has been first obtained. The results make it possible to synthesize the structures with the given optical characteristics. The prototypes of structures with the increased diffraction efficiency as compared to the earlier achieved values have been obtained. The fast response of the optical memory elements has been increased ten times. The optical memory element has been introduced in pivol production. The field of application covers devices of optical processing of images in real timeAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio

Spread Dynamics of Leucosis in Cattle in Livestock Farms of the Russian Federation for 2000–2018

Leucosis occupies a leading position in the modern nosological structure of cattle infectious diseases. This is due to the high infection of livestock and large economic damage in affected farms [1–3]. Leucosis is a chronic tumor disease caused by an RNA-containing virus of the Retroviridae family. The disease is characterized by uncontrolled reproduction of immature hematopoietic cells [4, 5]. The objective is to assess in dynamics the indicators of cattle infection with the leucosis virus and the incidence of leucosis in farms of all categories of the Russian Federation in the period of 2000–2018. The data of the analysis of the epizootic situation for leucosis in cattle in farms of all categories of the Russian Federation for 2000-2018 are presented. Over this period of time, the number of diagnostic serological studies in the immunodiffusion reaction increased 1.88 times in all subjects. According to the results of epizootological monitoring in farms of all categories of the Russian Federation, the rates of infection of the bovine leucosis virus decreased 1.89 times, the incidence rates decreased 2.02 times. At present, the epizootic situation has improved markedly, but so far there are problems with incomplete release of farms from leucosis in cattle. It is necessary to continue work on the elimination of this dangerous chronic disease in farms of all categories in the territory of the Russian Federation