• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Tropical Animal Health and Production >A preliminary study of the role of ducks in the transmission of Newcastle disease virus to in-contact rural free-range chickens
【24h】

A preliminary study of the role of ducks in the transmission of Newcastle disease virus to in-contact rural free-range chickens

机译：鸭在新城疫病毒向农村接触自由放养的鸡中传播中的作用的初步研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The role of ducks in the transmission of Newcastle disease virus (NDV) to free-range village chicken was investigated experimentally. Newcastle disease (ND) seronegative ducklings reared in a pen were infected oronasally with velogenic NDV of intracerebral pathogenicity index (ICPI) 1.8 isolated from outbreaks in village chickens in Uganda. A first group of 3-week-old ND seronegative chicks was mixed with the ducks and they were kept together for 7 days. Both ducks and chicks were observed for ND clinical signs and any mortality, and they were bled and their sera were tested for ND antibodies by haemagglutination inhibition (HI) test. The chicks were removed, euthanized and examined for any ND lesions, while the ducks were transferred to a fresh pen and a second group of chicks was introduced and observed and treated as above. The ducks and the chicks tested positive for ND antibodies 7 days post infection and contact, respectively, but showed no clinical signs, post-mortem lesions or mortality. The mean ND antibody titre of the second group of chicks was lower than for the first group. This study has shown that although ducks can be infected with velogenic NDV, they do not show clinical signs but are able to transmit NDV to in-contact chicks. Further investigations are needed of the lack of clinical signs in the in-contact chicks and how long the ducks remain infective.
机译：实验研究了鸭在新城疫病毒（NDV）向散养乡村鸡的传播中的作用。笔中饲养的新城疫（ND）血清阴性小鸭经口鼻感染了从乌干达乡村鸡疫情暴发中分离出的脑致病性指数（ICPI）1.8的速溶型新城疫。将第一组3周龄的N​​D血清阴性小鸡与鸭子混合，将它们一起饲养7天。观察鸭子和小鸡的ND临床体征和死亡率，并放血并通过血凝抑制（HI）测试测试其血清的ND抗体。将小鸡移出，实施安乐死并检查是否有任何ND损伤，同时将鸭子转移到新鲜的围栏中，并引入第二组小鸡，并如上所述进行观察和处理。鸭子和小鸡分别在感染和接触后7天检测到ND抗体呈阳性，但未显示任何临床体征，死后病变或死亡率。第二组小鸡的平均ND抗体滴度低于第一组。这项研究表明，尽管鸭子可以感染速溶NDV，但它们没有临床症状，但能够将NDV传播给接触小鸡。需要进一步研究接触小鸡缺乏临床体征以及鸭子保持感染的时间。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号