4CALNEK B W.禽病学[M].10版.高福,苏敬良,译.北京:中国农业大学出版社,1999:988-995.
5LAMONT S J.Lamout.Impact of genetics on disease resistance[J].Poultry Science,1998,77:1111-1118.
6殷震,刘景华.动物病毒学[M].2版.北京:科学出版社,1987:351-353.
7YUNIS R,BEN-DAVID A,HELLER E D.Immunocompetence and Viabil-ity Under Commercial Conditions Of Broiler Groups Differing in Growth Rate and in Antibody Response to Escherichia coli Vaccine[J].Poultry Science,2000,79:810-816.