The spread of equine parascariasis in the Tyumen region
Abstract
V.N. Domatsky* and A.N. Siben
The article provides information on the spread of parascaridosis equids in the Tyumen region. According to the studies conducted, the incidence rate among horses with P. equorum in Tyumen region farms in the period from 2012 to 2016 ranged from 4.8% in 2015 to 7.55% in 2013. In areas with periodic findings of parascaridosis equids, the minimum infection of animals was observed in the Armizonsky district with a prevalence of 2.49% (2014), and the maximum in the Sorokinsky district with a prevalence of 25.76% (2015). The extent of invasion of parascaridosis in permanently troubled areas varied from 1.08% (2015) in Berdyuzhsky to 61.67% (2016) in the Isetsky districts. The analysis of the possible relationship between the extensiveness of parascaridosis invasion among horses and the location of the research areas in a certain natural and climatic subzone is carried out. The highest infection rate among horses with P. equorum was observed in the subzone (prevalence 10.67%) and the lowest in the southern taiga subzone (prevalence 0.18%). There was an increase in the invasion index of P. equorum extension invasion when moving from north to south, respectively, from the southern taiga subzone with the prevalence of 0.18%, to the subtaiga-8.94%, in the northern forest-steppe-10.67%, and a significant decrease in the southern forest-steppe to 3.97%. These indicators confirm the presence of more favourable conditions for the invasion of horses by P. equorum in the subzones of taiga and northern forest-steppe. During the study period (2012-2016), no definitive dependence of the change in the extent of the invasion was revealed, except for an obvious decrease in the indicator with its previous increase, which is obviously associated with a more careful implementation of antiparasitic measures.