simultaneous presence of bovine papillomavirus in blood and in short-term lymphocyte cultures from dairy cattle in pernambuco, brazil.bovine papillomaviruses (bpv) are the causal agents of benign and malignant lesions; they can cause dramatic economic losses in cattle. although 10 virus types have been described, three types are most common in tumors, namely bpv-1, -2 and -4. previous studies have reported bpv in blood cells and the possibility of blood acting as a latent virus site and/or transmission agent of virus dissemination. we studied a holstein dairy herd in pernambuco, brazil, in which several animals showed severe c ...200920082260
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