ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2016, Vol. 47 ›› Issue (1): 128-134.doi: 10.11843/j.issn.0366-6964.2016.01.017

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Co-infection of Field Marek’s Disease Virus with Reticuloendotheliosis Virus Prevalent in Vaccinated Chicken Flocks

SU Jing-wei1,2,TENG Man1,LUO Jun1,3* ,CHI Jia-qi1,YU Zu-hua3,YU Le-le1,HU Bo1,ZHANG Gai-ping1,2*   

  1. (1.Key Laboratory of Animal Immunology of the Ministry of Agriculture,Henan Provincial Key Laboratory of Animal Immunology,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China;2.College of Animal Science and Veterinary Medicine,Henan Agricultural University,Zhengzhou 450002,China;3.Key Laboratory of Animal Disease and Public Safety,College of Animal Science and Technology,Henan University of Science and Technology,Luoyang 471003,China)
  • Received:2015-03-23 Online:2016-01-23 Published:2016-01-23

Abstract:

This study was performed to investigate the co-infection and natural recombination of Marek’s disease virus (MDV) and reticuloendotheliosis virus (REV) in chicken flocks in China,and evaluate the potential influences of viral recombination on MDV biology.Based on polymerase chain reaction (PCR),DNA sequencing and indirect immunofluorescent assay (IFA),we presently studied a total of 17 MDV field isolates obtained from the vaccinated chicken flocks in Henan province.The PCR results showed that,among the 17 Henan isolates,two isolates,HNGS206 and HNXZ103,are recombinant MDVs containing the REV-LTR inserts.Subsequent experiments showed that neither of the two isolates are natural recombinant viruses and the integrations of LTR into the viral genomes may result from the clinical co-infection and/or virus isolation procedure.Our data indicates that although a wide-spread co-infection of both MDV and REV exists in chicken flocks in China,the epidemiology of the naturally occurring recombinant MDVs needs to be further monitored.

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