Department of Veterinary Microbiology;
University of Agriculture;
Faisalabad 38040;
Pakistan;
Institute of Preventive Veterinary Medicine;
School of Animal Sciences;
Zhejiang University;
Hangzhou 310029;
China;
IBDV; 二元乙烯亚胺; 甲醛; 免疫响应; 传染病; 小鸡;