Analysis of screening serological studies of bovine leucosis in separate districts of Poltava region
DOI:
https://doi.org/10.31210/spi2025.28.04.30Keywords:
leucosis, cattle, serological studies, preventionAbstract
During the period from 2018 to 2024 in the Regional State Laboratory of the State Food Products’ Consumer Service in Poltava region, the monitoring studies of cattle stock blood serum for leucosis were conducted with the aim to prevent this disease according to the “Plan of conducting diagnostic examinations to prevent contagious diseases”. To carry out epizootic screening, generally adopted (standard) methods of AGID and ELISA were used. The results’ registration was made in nine districts of Poltava region: Hadiach, Chornukhy, Hlobyne, Zinkiv, Novi Sanzhary, Dykanka, Velyka Bahachka, Hrebinka and Lokhvytsia districts. Insignificant increase in the share of positively reacting to leucosis animals were found in Lokhvytsia district where the number of such animals made 0.1% of the total amount. As a result of investigations in 2022, 2023, and 2024, gradual increase in the number of such animals was revealed in Hrebinka district. During these periods, the share of positively reacting cows made 0.5, 0.8, and 3.3 %, respectively. Stable tendency as to decreasing in the number of animals positive to leucosis was observed in Hadiach, Chornukhy, Zinkiv, Novi Sanzhary, Dykanka, and Velyka Bahachka districts. The exact and timely diagnostics of leucosis by using AGID and ELISA methods, which was conducted during the above mentioned period, ensured the absence of animals serologically positive to leucosis in Hadiach, Chornukhy, Zinkiv, Novi Sanzhary, Dykanka, and Velyka Bahachka districts of Poltava region in 2024. Timely revealing by AGID and ELISA methods of animals positive to leucosis on the farms of different forms of property is crucial in the system of measures to prevent bovine leucosis. The revealing of such animals is possible in different periods even on the farms where for a long time all blood serum samples of cattle were negative. This can be connected with various factors: the conditions of keeping, the effect of stress factors, the stock movement, purchase of animals, and long incubation period, during which the specific antibodies to the causative agent are not detected. Therefore, planned serological monitoring and the analysis of the obtained indicators are the basis for the prevention and prognostication of the epizootic situation as to bovine leucosis.
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