Abstract
The production culture in industrial poultry has risen to a high level and continues to improve in recent years. Profitability of production is the main task of poultry farming, as for any industrial branch. This is due to the intensification of production, a reduction in the period of sanitary preparation of premises, and a high concentration of poultry stock on a limited area. These conditions contribute to the spread of parasitic diseases and eimeriosis is the leading among them. The experiments were carried out on 14-day-old Cobb-500 cross broiler chickens in the laboratory and vivarium of the institute in 2019. First, Virukill 260 working solutions in different concentrations, WSH buffer solution, and bird feces preservative were prepared. Virukill is a multicomposite drug in the form of a liquid, this medicine is used to disinfect and disinfestation objects of veterinary surveillance and the prevention of infectious and invasive animal diseases. Chickens of the first, second and third groups were assigned 1 ml of a suspension of Eimeria oocysts treated with 0.5; 1 and 2% solutions of the drug Virukill 260, inside using a micropipette; the fourth - also 1 ml of a suspension of Eimeria oocysts treated with a 4% phenol solution. Young animals of the fifth group were injected with sporulated Eimeria oocysts at a dose of 2000 / ml of a suspension not treated with a disinfectant (infected control); and the sixth - only 1 ml of WSH buffer solution (uninfected control). The chickens were subjected to daily clinical observations, taking into account the general condition, behavior, appetite, visible physiological changes throughout the experiment. The intensity of Virukill 260 in 0.5-, 1- and 2% concentrations against coccidium oocysts was 94.15; 97.6 and 98.17%, respectively, and phenol at 4% concentration was 88.75%. The following Eimeria species were identified: Eimeria acervulina (21.4%), E. brunetti (15.7%), E. maxima (29.6%) and E. tenella (33.3%) in broiler litter samples from the first to the fifth group.
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