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Short Communication
QX-like infectious bronchitis virus isolated from cases of proventriculitis in commercial broilers in England
  1. K. Ganapathy, DVM, PhD, DipECVPS, MRCVS1,
  2. M. Wilkins, BSc1,
  3. A. Forrester, BSc, MPhil1,
  4. S. Lemiere, DVM2,
  5. T. Cserep, DVM, MRCVS3,
  6. P. McMullin, MVB, MSc, DPMP, MRCVS4 and
  7. R. C. Jones, BSc, PhD, DSc, FRCPath1
  1. 1Department of infection Biology, University of Liverpool, Leahurst Campus, Neston, South Wirral, CH64 7TE, UK
  2. 2Merial S.A.S., 29 Avenue Tony Garnier, Lyon cedex 07 69348, France
  3. 3MSD Animal Health, Walton Manor, Milton Keynes MK7 7AJ, UK
  4. 4Poultry Health Centre, Dalton, Thirsk, North Yorkshire YO7 3JA, UK

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This short communication reports on the isolation of QX-like infectious bronchitis virus (IBV) from the proventriculus of broiler chicken in England, and its pathogenesis in specific-pathogen-free (SPF) chicks. This appears to be the first report of the isolation of this virus from the proventriculus of affected chicks in the UK. The virus was first recovered from this tissue in chickens in China in 1996 (YuDong and others 1998), and later, more cases were reported, including in flocks vaccinated against IBV (Yu and others 2001).

We received samples of kidney and proventriculus from a flock of 56-days-old commercial broiler chickens, where the submitting field veterinarian reported respiratory signs, increased levels of mortality, a poor feed conversion ratio and suboptimal live body weight gain. At necropsy, proventriculitis and swollen kidneys were reported. Similar tissues were pooled and processed for IBV detection by reverse-transcriptase PCRs (RT-PCR), as previously described (Worthington and others 2008), and virus isolation (VI) were attempted. RT-PCR tests on the supernatant of the pooled tissues of kidneys were negative for IBV, while the proventriculus samples were positive. The proventriculus was negative for avian metapneumovirus (aMPV), Newcastle disease virus (NDV) and …

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