Bleeding diathesis associated with variant von Willebrand factor in a Simmental calf.


A 10-month-old Simmental heifer was examined because of a 10-day history of epistaxis and aural hematomas. Examination of the calf also revealed hemarthrosis. Initial laboratory data indicated that platelet count, platelet size, prothrombin time, and partial thromboplastin time were not different from a clinically normal (control) cow. Mucosal bleeding time… (More)


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