Abstract
BPV-2 infection can cause bladder infections in cattle that, when associated with bracken fern consumption, can progress to cancerous bladder tumors and also present as bovine enzootic hematuria (BEH). This study aimed to evaluate the prolonged natural BPV-2 infection in the blood and urine of cattle, excluding bracken fern consumption. Thirteen Girolando papillomatosis-affected cattle with no bracken fern contact history were monitored for 20 months. Blood, urine, and wart samples were collected for BPV-2 detection and clinical laboratory analyses. All animals showed the presence of BPV-2 in papillomas and blood, and 92.85% showed BPV-2 in urine, suggesting viral dissemination in the urinary tract. Despite all animals being infected with BPV-2, none showed BEH signs during the study. Thus, it was observed that BPV-2 infection alone didn't induce BEH over 20 months, implying a complex interaction with environmental factors or genetic predisposition. This underlines bracken fern consumption's critical role in urinary bladder carcinogenesis. The study underscores BEH's pathogenesis complexity, advocating longitudinal studies to comprehend BPV-2's role fully.
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