NAVLE（北美执业兽医考题）Day 473

A six-year-old female spayed cocker spaniel is presented with a two-day history of lethargy. Upon physical exam mucosal petechiae and ecchymoses and an ocular hemorrhage O.D. is noted.A coagulation profile shows the following:Thrombocytes= 49,720.[N=200,000-900,000]Buccal mucosal bleeding time (BMBT), increasedActivated partial thromboplastin time (aPTT), normalProthrombin time (PT), normalThrombin time (TT), normalWhich one of the following diseases is the most likely diagnosis?一只6岁的雌性已绝育可卡犬由于持续2天的倦怠前来就诊。体格检查发现其黏膜出现瘀点和瘀斑以及右眼出血。其凝血测试结果如下：血小板= 49,720.[正常=200,000-900,000]颊粘膜出血时间BMBT，延长活化部分凝血活酶时间aPTT，正常凝血酶原时间PT，正常凝血酶时间，正常以下哪个疾病是最可能的诊断？Find out the answer by clicking on one of the listed choices. Good luck!点击列出的选项找出答案，祝大家好运