EPIZOOTOLOGY DIROFILARIASIS OF URBAN POPULATION IN DOGS OF IVANOVO REGION

Abstract

In recent years, in the European part of the Russian Federation, there has been an increase of invasions transmitted through blood-sucking insects – mosquitoes of the genus Aedes, Culex, Anopheles, which are intermediate hosts of Dirofilaria immitis and Dirofilaria repens, which parasitize carnivorous animals. In the Ivanovo region, the extensiveness of dirofilaria invasion in residential and stray dogs is 2.6 and 5.3%, respectively. In the period 2010–2018 we examined dogs located in the territory of the regional center – the city of Ivanovo and cities of regional significance. The study was subjected to 95 stray, 743 mongrel dogs and 844 dogs of various breeds. Our research showed that microfilariae were found in 48 dogs in the territory of the cities of the Ivanovo region, the average extensiveness of invasion was 2.8% with an invasion intensity of 1-36 larvae in the field of view of the microscope. The infection of dogs with dirofilariae over the years ranged from 2.3% to 3.11%. In carnivores, we diagnosed only one type of pathogen – Dirofilaria repens. The greatest extensiveness of dirofilaria invasion was found in fighting dogs (16.6%), homeless (stray) dogs (5.3%). Microdirulence of the service dogs, street mongrel dogs and hunting breeds were microorganisms, respectively, 3.1%, 3.0% and 2.6%. Dogs living in the houses and apartments of their owners, both decorative and mongrel, were infested by dirofilaria larvae to a lesser extent 2.3–2.0%. The extensiveness of invasion of the examined pedigree dogs ranged from 0.8% to 100% and averaged 2.7%. The average invasion of mongrel domestic dogs was 2.7%.