强效艾美耳牌鸡球虫苗的免疫效果

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。实验３比较了免疫鸡群、不

STUDIES ON THE EFFICACY OF EIMERIVAC PLUS,A COCCIDIOSIS VACCINE FOR CHICKENS

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