Etiologic structure of animal leptospirosis in the republic of sakha (Уakutia)

Abstract

 Over the period of research from 2003 to 2019 years, only 247 foci of leptospirosis of animals were registered in Yakutia, including: cattle – 61 (25.5 %), horses –159 (65.4 %), pigs –13 (5.3 %), small cattle – 8 (3.2 %), fur animals – 1 (0.4 %), bison – 4 (1.6 %). At the same time, a significant part of the foci of leptospirosis falls on horse breeding – 65.4 %. The largest number of disadvantaged points was established in 2008–49, including in horse breeding farms – 34 (69.4 %). An increase in the spread of the disease can be observed from 2003 to 2008 with a frequency of two years, and from 2008 – four years. Over the past 15 years, the introduction of leptospirosis pathogens has been established in 29 districts of the republic. It has been established that in the republic the main circulating serogroups of leptospirare Hebdomadis, Tarassovi, Icterohaemorrahagiae, Grippotyphosa, Canicola and Pomona. In zones of local economic stress, the source for the emergence and spread of leptospirosis are farms with a high number of farm animals. Of particular note are epizootic manifestations of leptospirosis in the Central Zone, which currently accounted for 80 % of the total quantity, in the remaining zones ranges from 2.5 to 7.5 %. It was revealed that the largest number of positive results was revealed in the spring period from April to June, and in the winter period – from November to December.