ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2015, Vol. 46 ›› Issue (2): 264-272.doi: 10.11843/j.issn.0366-6964.2015.02.013

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The Epidemiological Investigation of the Chicken Infectious Bronchitis in China between 2010 and 2012

YOU Yong-jun1,2,ZHANG Guo-zhong 1*,LIU Yue-huan3,WANG You2,LIANG Wu2,LIU Xing-cai2,SHEN Yuan2   

  1. (1.College of Veterinary Medicine,China Agricultural University,Beijing 100193,China;2.Tianjin Ringpu Bio-technology Co.,Ltd,Tianjin 300381,China;3.Institute of Animal Sciences,Chinese Academy of Agricultural Sciences,Beijing 100193,China)
  • Received:2014-06-04 Online:2015-02-23 Published:2015-02-23

Abstract:

The chicken infectious bronchitis (IB) is a broad epidemic and infectious disease,and became a critical threat to poultry industry in China.To understand the current national IBV epidemiological situation,3 132 samples collected between 2010 and 2012 in China have been tested by the Ringpu Diagnosis Research and Service Center.There were 410 IBV positive results by RT-PCR method,then statistic and analyzed by cross-references,such as by time,geography,clinical symptoms and animal species etc.The results showed that 1) 13.1% of all samples were IBV positive,and 26.7% of positives were multiplex infection,especially with AIV-H9 or NDV.2) White feather broilers are more susceptible to the wild IBV,the isolation rate was 13.6%.3) The IBV incidence showed quite clear seasonal changes,especially between November and next May.4) The main clinical symptoms of IBV were kidney swelling and respiratory symptoms,also showed egg drop and proventriculitis sometimes.5) The 3-5 weeks old white feather broilers had the highest IBV isolation rate,but also the 3-5 and 25-30 weeks old period of layer chicken.Through the epidemiological investigation on IBV,it provides important scientific data and evidences which are important to develop effective strategies for prevention and controlling IB.

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