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The aim of the study was to evaluate the epidemiological condition of SRLV infections in nucleus flocks of sheep. The surveillance of Lentivirus infections was conducted in sheep flocks from the mid-Eastern part of Poland: the area of Lubelskie, Świętokrzyskie and Podkarpacie provinces. Ninety eight flocks were chosen for a detailed analysis. They included 6,470 mother ewes belonging to 15 breeds...
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