Bovine leukemia virus in Omsk region and its correlation with cycle of solar activity

We were traced the long-term (1996 to 2015) epizootic dynamics of epizootiological indicators characterizing the number of carriers of the bovine leukemia virus (BLV) and animals suffering from leucosis on the territory of the Omsk region in comparison with one of the parameters heliophysical factors - Wolf number. The results of the conducted research showed that the maximum number of animals of virus-carrier identified in reaction of immune diffusion (RID), was observed to the periods of high solar activity, whereas decreasing of the numbers of Wolf the frequency of the registration of cattle, reacting in a diagnostic test, is reduced, which confirms a positive coefficient of correlation between the studied parameters (r = 0.66). At the same time the examined factors affected not so obvious way (r = 0.37) for another an indicator characterizing the number of animals suffering from leukosis. In addition, it was found that the relationship between the intensity of Sun exposure and leukemic manifestation of infection significantly enhanced in the odd of solar cycle (1996-2008), it can be isolated especially strong correlation (r = 0.95) with infectivity of BLV, and conversely, it has a reverse correlation in the even cycle (since 2008). In the next stage of the research it was to study the effect of meteorological factors (air temperature, total precipitation, sunshine duration and atmospheric pressure) on epizootological indicators. The correlation’ analysis showed the low degree of influence of these factors on the level of infection of BLV and the frequency of detection of animals with hematological stage of leukosis, which does not make an unambiguous conclusion about the mediated effect of solar activity by meteorological factors.