EPIZOOTIC SITUATION ON THE MAIN GASTROINTESTINAL HELMINTH INFECTIONS OF HORSES IN THE ALTAI REPUBLIC

One of the problems of herd horse breeding of the Altai Mountains is significant spread of helminth infections. The purpose of this research is to characterize the epizootic situation on intestinal helminthiasis in the main horse-breeding areas of the Altai Republic. Coproovoscopic studies of horse feces from 8 districts (Mayminsky, Shebalinsky, Ongudaisky, Chemalsky, Ust-Koksinsky, Kosh-Agachsky and Ulagansky) were carried out for eggs of intestinal helminths by the KotelnikovKhrenov flotation method with the counting of eggs according to the VIGIS method. In total, 989 fecal samples from adult New Altai horses were examined. According to the results of coprological examinations, indicators of infection were derived: IP, %, the infection prevalence, the proportion of infected animals; mII is the arithmetic mean of the number of eggs in 1 gram of feces (egg/g f.) per one examined animal. In the horses of the Altai Mountains, pathogens of gastrointestinal helminth infections belonging to 5 suborders were recorded: Strongylata, Ascaridata, Anoplocephalata, Oxyurata and Rabditata. To a greater extent, the horses were infected with gastrointestinal Strongylata with an IP level of 76.2% and an egg count of 293 specimens in a gram of feces, and to a lesser extent with Parascarids (IP 11.2%) and Anoplocephalida (IP 12.3%). The animals in the Chemalsky District were most intensively infected with helminths (IP 96.3%), significantly lower than the horses in the Kosh-Agachsky District (IP 62.3%).