DIAGNOSIS OF EIMERIOZES IN CATTLE

The purpose of the study is to conduct a comparative analysis of two methods for diagnosing eimeriosis in cattle and to identify the most accessible and effective of them. The spread of eimeriosis in on the territory of the training and experimental commercial dairy farm N3 Kuban was studied. When making a diagnosis, clinical signs in young and adult animals, epizootological data, as well as the results of laboratory studies of fecal samples were taken into account. In total, 215 faecal samples from Holstein cattle were examined. Fülleborn and McMaster methods were used for diagnosis. Determination of eimeria to species was carried out using the Krylov determinant. According to outpatient journals, seasonal and age-related predisposition to the disease was revealed. Of the more than 20 species of Eimeria described in cattle, the species responsible for the most pronounced manifestation of clinical signs with the phenolmenon of hemorrhagic diarrhea: E. Zuerni, E. Bovis, E. Ellipsoidalis prevail in this educational and experimental farm. It has been established that the McMaster method is the most effective and affordable for the diagnosis of eimeriosis in cattle. The age groups most vulnerable to this invasion were identified: the prevalence of invasion in calves of 1–2 months of age is 12 %; 2–4 months – 22; 4–6 months – 31 %. An analysis of the degree of manifestation of invasion was made, which showed that clinically pronounced coccidiosis, as the most economically costly form, manifests itself in 46 % of cases, while the subclinical form was detected in 54 % of the studied calves. As a result of a study of the consequences of a long-term illness of calves with eimeriosis in a subclinical form, it was concluded that there would be significant consequences in the future on the part of the gastrointestinal tract and other body systems. These factors reduce the degree of overall development and economic feasibility of keeping such calves due to a lack of muscle mass, reduced immunity and reduced milk production.