摘要
某鸡场MD免疫鸡群65～85日龄鸡大量发病、死亡，用多种约物治疗无效，通过流行病学、症状、病理剖检和细菌学、血清学（琼脂扩散）试验诊断为鸡马立克氏病。
This article reported on The outbreak and cure of Mareks disease (MD) of 65~85 days old immune fouls in a fowl-run. We diagnosed to The Mareks disease according to the prevelcnce conditon,symptom, the changes of the pathotogy and the rcsult of bacteriology and serum diagnosis
