The role of colostral immunity in the effectiveness of serological detection of BLV

The purpose of our research was to study the influence newborn calves colostral antibodies on efficiency bovine leukemia virus detection by serological methods. conducted basis agricultural organizations within territory Ural Federal District (Chelyabinsk region). We undertook comprehensive diagnostic studies fed with milk from seropositive and seronegative animals using polymerase chain reaction, ELISA test, immunodiffusion test. Experimentally it found that feeding cows led immunoglobulins persistence for up 3-3.5 months, in most animals, which may be associated end suckling period calves. At same time, screening during this is difficult due a high concentration antibodies. obtained results laboratory indicate PCR diagnostics detecting specific locus calf at early stages infectious process. provides an opportunity evaluation latent course BLV, excluding immunity, thereby reducing recovery time enterprises 20%.