Unexpectedly, bursectomy led to persistence of infection while clearance of infection occurred normally in thymectomized ducks despite decreased T lymphocyte numbers.

• 与预期的不同，法氏囊切除导致感染持续存在，而感染清除主要发生在胸腺切除的鸭子中，尽管它们的T淋巴细胞数量降低。