3种不同地理株柔嫩艾美耳球虫交叉免疫保护性研究

Study of cross-immunity in 3 different geographic strains of Eimeria tenella

目的研究柔嫩艾美耳球虫(E.tenella)保定株、长春株、黑龙江株交叉免疫保护性。方法12d龄AA肉鸡分别用E.tenella保定株、长春株、黑龙江株免疫,24d龄相互攻虫。结果保定株和长春株、黑龙江株的交叉保护率分别为60.4%、61.0%,长春株和黑龙江株为71.0%。结论长春株和黑龙江株的交叉保护率与保定株和长春株、黑龙江株的交叉保护率比较差异极显著(P<0.01)。

Objective To investigate cross-immunoprotection in the Baoding,Changchun,and Heilongjiang strains of Eimeria tenella.Methods AA broiler chickens were inoculated and challenged with the Baoding,Changchun,or Heilongjiang strain of E.tenella.Results Cross-protection was 60.4% for the Baoding and Changchun strains,61.0% for the Baoding and Heilongjiang strains,and 71.0% for the Changchun and Heilongjiang strains.Conclusion Cross-protection was significantly higher for the Changchun and Heilongjianng strains in comparison to the Baoding strain（P0.01）.