SCREENING TESTS OF DETECTION ENZOOTIC BOVINE LEUKOSIS IN BULGARIA DURING 2016–2017

In 2016, with blocking ELISA for antibodies in individual blood sera from cattle, seropositive reagents were found in 2 districts: Lovech – 3.8% and Montana – 35%. In 2017, the seropositive reagents in Blagoevgrad district were 17.4%. In the other 2 districts – Lovech and Sofia-city the laboratory tests were with negative result. In 2016–2017, in 3 districts a screening studies of single blood samples was carried out, for which was not perform statistically reliable results. During 2017 in NRL „EBL“ were using ELISA test for screening of antibodies in pooled and individual milk samples against gp 51. In 9 districts, 134 pooled and 3 individual milk samples were tested and a total of 101 positive reagents were detected. For control and prevention of EBL in Bulgaria, European funding is needed to implement a monitoring program.