Bovine leukemia virus antibodies in dairy cattle farms and milk cooling tanks
Kale, MehmetHasircioglu, SibelYavru, SibelYapici, OrhanGur, SibelAvci, OguzhanSunar, OmerMamak, NuriGulay, Mehmet Sukru
Background: Bovine leukemia virus (BLV) is a retrovirus. It is common infectious viruses of cattle with worldwide distribution. Milk from infected cows often contains BLV-infected cells are a common cause of infection. Eradication andcontrol of BLV is based on early diagnostic. Both serum and milk samples can be tested by ELISA and it is possible to testeither individual samples or, at a herd level, milk cooling tanks (MCT) samples. The aim of this study is to determine BLVantibodies (Abs) in the MCT, milk cans, and individual blood and milk samples of dairy cows in dairy cattle managementslocated in Burdur center and its districts and to follow and study the infection on the milk production chain.Materials, Methods & Results: Milk samples were collected from 50 main MCT. Studies were carried out in the managements that seven BLV Ab (+) and seven Ab (-) in their main MCT were located. For this purpose, milk samples werecollected from mixed milk cans that were collected from managements providing milk for main MCT. Blood and milksamples were collected from dairy cows, housed in managements where BLV Ab (+) and Ab (-) was detected. Highestand lowest percent BLV (+) management, percent BLV (+) can numbers and percent milk amount were in 1 ton and 2ton MCT, respectively. Moreover, these parameters were paralleled in all MCT. Percent BLV (+) and milk amounts werehighest in 3 ton MCT and lowest in 2 ton MCT. In addition, these parameters were paralleled in all MCT. Distributionsin BLV (+) managements ranged from 15 to 75%. It was detected at the individual animal levels, BLV (+) milk sampledistributions ranged between 7.4 and 38.4%. Age range of the BLV (+) cows was between 3 and 11 years. Individual BLVtests between milk and serum samples were correlated positively in 5 managements (71.4%). On the other hand, the correlation was not detected in 2 of the managements (28.6%) that the individual milk and serum samples were collected. BLV...(AU)
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