摘要
为了解潍坊市鸭病毒性肝炎流行情况,从山东省潍坊市的昌邑、寿光、昌乐等9个市县区发病严重的鸭场采集病料,采用鸡胚尿囊腔接种法分离到22株病毒,经鸡胚中和试验和雏鸭血清保护试验,采集样本中发现22株病毒为鸭肝炎病毒。其鸡胚半数致死量（ELD50/0.2m L）均在10-5.9~10-5.4之间,平均为10-5.6。鸭病毒性肝炎在潍坊市的昌邑、寿光、昌乐等9个市县区时常发生,该病虽一年四季均有发生,但春季和冬季出现的频率略高。多个日龄的鸭均可感染发生鸭病毒性肝炎,但发病日龄相对集中在4~21日龄,且日龄越小,发病率和死亡率越高,4~7日龄的发病率和死亡率分别达50.9%和58.7%,是危害潍坊肉鸭养殖业最重要的疫病之一。
Twenty-two virus isolates were abtained from infected ducks in 9 cities and counties of Weifang using speciifc pathogen free（SPF）chick embryos and all were conifrmed as duck hepatitis virus（DHV）by chick embryos neutralization test and serum protection test of young duck. ELD50 of the isolates ranged from 10^-5.9 to 10^-5.4 with the average of 10^-5.65. The epidemiological results showed that DVH often appeared in 9 cities and counties of Weifang. DVH could infect ducks of different ages in all seasons,but it was most common in spring or winter and 4-21-day-old ducks were more easily infected. The younger the ducks,the higher the morbidity and the mortality were and the morbidity and mortality in 4-7-day-old ducks was up to 50.9%and 58.7%respectively.
出处
《中国动物检疫》
CAS
2014年第12期50-53,69,共5页
China Animal Health Inspection
关键词
鸭病毒性肝炎
流行病学
调查
duck viral hepatitis
epidemiological investigation
morbidity
mortality
Weifang
