摘要
本试验测定了母鸭免疫后不同时期所产雏鸭的母源抗体及其卵黄吸收情况。结果表明：（１）１～４周龄雏鸭血清中均含母源抗体，在１～３周内可获得不同程度保护。５～８ｄ为母抗高峰期，保护率１００％（６／６），３～４ｄ和１０～１４ｄ的保护率８３．３％（５／６），２０ｄ后保护率不到５０％。（２）同居感染结果，５日龄保护８０％（４／５），１０日龄保护４０％（２／５），１５日龄２０％（１／５），２０，２５日龄均无存活。（３）正常情况（脐带收得好）下，出壳７２ｈ卵黄吸收率达８４．８％，１２０ｈ吸收率９５．１％，１７２ｈ几乎全部（９８．９％）吸收。
The present experiment has estimated the maternal antibody againstduck plague and the behaviors of yolk-absorption in ducklings hatched from the fertil-ized eggs laid by immunized ducks at different times after vaccination. The results indi-cated that 1-4-week-old ducklings'sera contained some amounts of the maternal anti-body,there were protective potencies at different extents. The peak period of maternalantibody was in 5-8 days after hatching,its protective rate was 100%(6/6).In 3-4days and 10-14 days,the protective rate was 83.3%(5/6),and it was less than 50%after 20 days. The protective rate of 5-day-old ducklings that being mixedly raised in theinfected flock was 80%(4/5);at the age of 10 days,40%(2/5),while all the 20-day-old and 25-day-old ducklings died.If the umbilical cord was well shrunk,the yolk ab-sorptivity was 84.4%in 72 hours and 95.1%in 120 hours after hatching,thereafter(172 hours),all were almost absorbed.
出处
《中国兽医学报》
CAS
CSCD
1996年第2期122-124,共3页
Chinese Journal of Veterinary Science
关键词
鸭病
鸭瘟
霍乱
母源抗体
综合防治
疫苗
duck
duck plague
maternal antibody
neutralization test
