摘要
在实验条件下 ,研究了强效艾美耳牌鸡球虫苗对平养鸡群的免疫效果。实验 1比较了免疫鸡群和对照鸡群在接种后 1、2、3、4、5、6周的肠道病变分 ,结果表明免疫鸡群较自然感染建立免疫的对照鸡群的免疫整齐度高 ,判断依据是免疫后 2周盲肠细小、内容物亦少的眼观指标。实验 2比较了免疫鸡群、不免疫不用药鸡群、不免疫用药鸡群在攻虫后的三处肠道病变 ,结果表明免疫鸡群对大剂量卵囊攻击有很强的抵抗力 ,不免疫不用药组对相同剂量的卵囊攻击抵抗力表现不整齐 ,不免疫用药鸡群对攻虫没有抵抗力。实验 3比较了免疫鸡群、不免疫不用药鸡群、不免疫用药鸡群的生长情况 ,结果表明免疫鸡群生长均匀 (标准差小 ) ,但在接种后第 7～ 14天有个生长抑制期 ,第 15～ 2 1天有个生长代偿期 ,第 2 1天之后生长情况优于不免疫不用药组与不免疫用药组相当。三个实验的排卵囊曲线显示 ,免疫鸡群有两个排卵囊高峰 ,第一个在免疫后第 5天 ,第二个在第 12～
Three trials designed to examine the effect of Eimerivac Plus,a vaccine against chicken coccidiosis were carried out with Haihua male chicks kept on litter The effect of vaccination was evaluted,by comparing the uniform immunization developed by the vaccinated and nonmedicated chickens,and the nonvaccinated and nonmedicated chickens in the first trial,by comparing resistance to challenge infection,in terms of the mortality and intestinal lesions of the vaccinated and nonmedicated chickens,the nonvaccinated and nonmedicated chickens,and the nonvaccinated and medicated chickens fed diclazuril at 1 ppm from 5 to 25 days old in the second trial,by comparing the performance,in terms of growth,of the vaccinated and nonmedicated chickens,the nonvaccinated and nonmedicated chickens,and the nonvaccinated and medicated chickens fed diclazuril at 1 ppm througout in the third trial The vaccinated and nonmedicated chickens performed better
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
2000年第4期353-359,共7页
ACTA VETERINARIA ET ZOOTECHNICA SINICA
