The purpose of the work was to determine the effectiveness of different approaches to the recovery of cattle population from leukemia, and their impact on cattle productivity and profitability of livestock farming. The choice of measures to ensure the safety of a particular farm was determined by indicators of herd infection, number of livestock population in the holding, availability of conditions for isolated keeping of animals, availability of herd replacements. Two methods of serological testing were used during the work, namely ID and ELISA. The methodological basis of the work was the regular serological examination of conditionally safe concerning leukemia livestock in the ID — once every 20–30 days, or by ELISA — with an interval of 45–50 days. According to the results of each study, depending on the approach of farm recovery, infected with leukemia animals were slaughtered or isolated from the herd in an isolated group. Improvement of farms by detecting and slaughtering infected animals is economically justified only in the case of livestock infections up to 5–10%. In other cases, it is advisable to carry out rehabilitation by the method of gradual replacement of the infected livestock, which allows to ensure the safety of the farms during 2–4 years while saving the population and productivity of the livestock
Keywords: immunodiffusion test (ID), enzyme-linked immunosorbent assay (ELISA), cattle productivity, recovery
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