Scientia Agricultura Sinica ›› 2013, Vol. 46 ›› Issue (2): 409-416.doi: 10.3864/j.issn.0578-1752.2013.02.020

• VETERINARY SCIENCE • Previous Articles     Next Articles

Continuous Observation of Subgroup J Avian Leukosis for Three Groups of Commercial Layer Chicken

 BIAN  Xiao-Ming, LI  De-Qing, ZHAO  Peng, CUI  Zhi-Zhong   

  1. College of Animal Science and Technology, Shandong Agricultural University, Taian 271018, Shandong
  • Received:2012-09-14 Online:2013-01-15 Published:2013-01-06

Abstract: 【Objective】 The objective of the study is to understand the occurrence and development of subgroup J avian leukosis in the commercial layer chickens as well as the relationship with the isolation of the virus and antibodies.【Method】Thirty-one chickens suspectable of ALV-J at the age of 39 to 43 weeks from 3 groups were observed and compared continuously in clinical status, pathology, viremia and development of neutralizing antibodies. 【Result】 It indicated that the infection rate with ALV-J in these three groups was very high. Twenty-eight chickens were infected with ALV-J or had persistent viremia, of which 14 were detected as immunotolerized persistent viremia without neutralizing antibodies. Indicative myelocytomatosis of ALV-J was found in chickens of these 3 groups, and could be detected in almost all of the organs and tissues. Of these 31 chickens, 13 had tumor/hemangioma in three or more organs and 1 chicken had in at least 5 organs.【Conclusion】Result of this observation indicates that ALV-J is still epidemical in Chinese commercial layer chickens, and the virus is getting stronger during the epidemic.

Key words: commercial layer chickens , ALV-J , tumor/hemangioma , infection status

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