摘要
应用ＨＶＴ冻干苗常规免疫雏鸡、二倍剂量免疫雏鸡、常规免疫后又分别于１０日、２１日龄二次免疫雏鸡和未接种任何ＭＤ疫苗的雏鸡，在饲养期间和经鸡马立克氏病强毒（ｖＭＤＶ）攻击后，常规免疫组的ＭＤ发病减少率为６１．９％，二倍剂量组的ＭＤ发病减少率为７１．４％，１０日龄二次免疫组的ＭＤ发病减少率为７６．２％，２１日龄二次免疫组的ＭＤ发病减少率为８１％；与常规免疫鸡比较，二倍剂量免疫和１０日、２１日龄二次免疫鸡的ＭＤ发病减少率可分别提高９．５％、１４．３％和１９．１％。试验结果表明，采用上述三种方法进行免疫接种，可减少母源抗体对ＨＶＴ苗的免疫干扰，明显提高ＨＶＴ苗的免疫效果，其中以２１日龄时二次免疫效果更为明显。
Lyphilzed HVT vaccine was used to vaccinate day old ohiks;Campered with double dosage vaccinate day old chiks,one + 10 day old,one +21 day old vaccinate and inodutatod no MD Vaccine lontrol chiks.After all chiks were challenged with virulent MDV at the and ofenperimeatation(42 day old).The reducative rates of MD incidence ofchiks in one day old,double dosage,one +10 day old twice and one + 21day old twice vaccinative groups was 61.9%、71.4%、76.2% and 81%respectively.As Campered with one day old raccinative gronp,thereducative rates of double dosage,one + 10 and one +21 day old gronpswere rised 9.5%、14.3% and 19.1% respectively the results indicatedthat.double dosage,ong+10 day old twice,one +21 day old twicevaccination,may degrade interference of chik matenal HVT antibody anderhance immuity ignificantly,especially the method of one +21 day oldvaccination.
出处
《黑龙江畜牧兽医》
CAS
北大核心
1997年第8期9-10,共2页
Heilongjiang Animal Science And veterinary Medicine
关键词
火鸡
疱病毒
疫苗
免疫效果
Lyphilzed HVT Vaccine day old vaccination Vaccinate twiceImmune effect
