It should be emphasized that thymectomy is necessary to achieve a correct diagnosis in this condition. 要强调的是在这种情况下，胸腺切除来达成正确的诊断是必须要的。
DHBV infection combined with bursectomy increased significantly, while thymectomy decreased significantly the total leukocyte count. 感染鸭乙肝病毒并经法氏囊切除的粒细胞计数明显升高，而经胸腺切除的明显下降。
