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An Outbreak of Marek's Disease in Chickens in Central Ethiopia

机译：埃塞俄比亚中部鸡爆发马立克氏病

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摘要

A study was conducted on an outbreak of Marek's disease in a commercial poultry farm containing 8500 chickens in central Ethiopia. On repeated visits, farm and flock history was collected, sick birds were examined and clinical signs and daily mortality were recorded. A total of 80 (27 sick and 53 dead) birds 12–22 weeks old, were collected, autopsied and examined. The mortality rate was 46% for the first 14 weeks of the outbreak. Acute and chronic (classical) forms of the disease, the respective occurrence of which varied significantly (p<0.01) in young (14.6% vs 85.4%) and adults (48.7% vs 51.3%) were manifested. All the autopsied birds had gross and microscopic lesions indicative of Marek's disease in the peripheral nerve(s) and/or visceral organs. Lesions involving peripheral nerves and visceral lymphomas were recorded mainly in adults (28/35, 80%) and young birds (34/45, 75%), respectively. These differences in the two age groups were statistically significant (p<0.01). Young birds seem to be highly susceptible to the acute disease. Poor management, overstocking and lack of vaccination might have favoured the outbreak. Marek's disease causes considerable economic loss and is a major threat to poultry production in Ethiopia. This report emphasizes that Marek's disease should be considered as a disease of economic significance in chicken production in Ethiopia and warrants due attention.
机译：在埃塞俄比亚中部有8500只鸡的商业家禽场，对马立克氏病的暴发进行了研究。在反复访问中，收集了农场和羊群的病史，检查了病禽，并记录了临床体征和每日死亡率。收集，解剖和检查了80只（22-22周龄的禽类，有27只病死，有53只死亡）。爆发的前14周死亡率为46％。疾病的急性和慢性（经典）形式分别在年轻人（14.6％和85.4％）和成年人（48.7％和51.3％）之间发生（P <0.01）。所有尸体解剖的鸟类在周围神经和/或内脏器官均具有肉眼和微观病变，表明马立克氏病。分别记录到成年（28/35，80％）和幼鸟（34/45，75％）中涉及周围神经和内脏淋巴瘤的病变。两个年龄组的这些差异具有统计学意义（p <0.01）。幼鸽似乎对急性疾病高度敏感。管理不善，库存过多和缺乏疫苗接种可能助长了疫情。马立克氏病造成巨大的经济损失，是埃塞俄比亚家禽生产的主要威胁。该报告强调，埃塞俄比亚应将马立克氏病视为具有经济意义的疾病，并应引起注意。

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  • 来源
    《Tropical Animal Health and Production》 |2004年第4期|397-406|共10页
  • 作者

    F. Lobago; M. Woldemeskel;

  • 作者单位

    Department of Pathology and Parasitology Faculty of Veterinary Medicine Addis Ababa University;

    Department of Pathology and Parasitology Faculty of Veterinary Medicine Addis Ababa UniversityCollege of Veterinary Medicine Department of Comparative Medicine The University of Tennessee;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Marek's disease; pathology; diagnosis; Ethiopia;

    机译：马立克氏病;病理;诊断;埃塞俄比亚;

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