Detection of IBV QX in commercial broiler flocks in the UK

Irvine, Richard M.; Cox, William J.; Ceeraz, Vanessa; Reid, Scott M.; Ellis, Richard J.; Jones, Rosemary; Errington, Jane; Wood, Ann R.; McVicar, C.; Clark, Mike

doi:10.1136/vr.c6692

Cited by 16 publications

(11 citation statements)

References 14 publications

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“…We may have missed the acute infection stage when sampling slaughterhouses due to the elapsed time between the beginning of the infection and sampling. Indeed, the present prevalence is lower than that reported in previous studies in the United Kingdom and Jordan [ 10 , 13 ]. The prevalence in those studies reached about 60%, because the sampled chickens exhibited respiratory signs of infection or IB was suspected during sampling.…”

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confidence: 86%

Detection of infectious bronchitis virus strains similar to Japan in Taiwan

Tsai

Wang

2016

The Journal of Veterinary Medical Science

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A total of 1,320 tracheal samples from 66 broiler flocks sent to slaughterhouses and 42 tracheal samples from 42 flocks of local chickens in the field were collected for infectious bronchitis virus (IBV) gene detection by reverse transcription polymerase chain reaction using nucleocapsid-specific primers and spike-specific primers. Prevalence in broiler flocks was 39.4% (26/66) and in local chicken flocks was 11.9% (5/42). Several IBVs similar to Japan were detected in Taiwan. One-direction neutralization revealed that the reference antisera did not offer protection against the IBVs similar to those from Japan.

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confidence: 86%

Detection of infectious bronchitis virus strains similar to Japan in Taiwan

Tsai

Wang

2016

The Journal of Veterinary Medical Science

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“…This genotype of IBV mainly affects the respiratory and reproductive systems (Terregino et al, 2008;Ducatez et al, 2009). IBV QX isolated in Netherlands causes renal disease and false lay (Terregino et al, 2008;Irvine et al, 2010). In the UK, IBV QX-like was isolated from proventriculus of broilers with poor feed conversion ratio (FCR) and body weight gain which were also showing respiratory symptoms (Ganapathy et al, 2012).…”

Section: Incidence and Geographical Distributionmentioning

confidence: 98%

An overview of infectious bronchitis virus in chickens

Awad

Chhabra

Baylis

et al. 2014

World's Poultry Science Journal

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Infectious bronchitis virus (IBV) is one of the foremost causes of economic loss within the poultry industry. IBV is a commonly occurring, economically significant pathogen of commercial chicken. Economic consequences to the poultry industry comprise mortality, growth retardation and high condemnation rates in meat-type birds. In addition, decreased egg production, reduced internal and external egg quality, and reduced hatchability have been documented in layers and breeders affecting the performance of both meat-type and egg-laying birds. Apart from this some nephro-pathogenic strains cause kidney damage. Secondary pathogens can complicate the disease resulting in increased morbidity and mortality. Being a single stranded RNA virus, IBV has an enormous capacity to change both by spontaneous mutation and by genetic recombination resulting into the emergence of new variants. Since the first isolation of virus in 1937, it has been found almost all over the world. In addition, most countries are now known to have their own indigenous IBV variants. Despite the use of currently available live and inactivated vaccines, one of the most important difficulties to control IB is related to emergence of variant strains. The following paper reviews the current status of research into IBV.

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“…Although the source of ORT was not established, it is possible that infection may have become endemic in pheasants or wildlife within the geographical area of the affected estates. At the present time it appears to be an uncommon infectious component of respiratory disease in the wider pheasant population but, as an apparently new and emerging disease threat, continued investigation of field outbreaks through scanning surveillance activities (Irvine et al, 2010) will be required to monitor the impact of ORT and other emerging infectious agents.…”

Section: Discussionmentioning

confidence: 99%

Demonstration ofOrnithobacterium rhinotrachealein pheasants (Phasianus colchicus) with pneumonia and airsacculitis

et al. 2013

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Outbreaks of respiratory disease were investigated in reared pheasants (Phasianus colchicus) aged approximately 18 to 32 weeks, released into the semi-wild on four shooting estates in southern England. The clinical signs in the affected birds included swelling of the face and eyes, loss of condition, gasping respirations and coughing. The gross pathology findings included sinusitis, airsacculitis, pleural oedema and lung lesions. The histopathological findings in the affected lungs were characterized by a granulomatous pneumonia. Ornithobacterium rhinotracheale (ORT) was isolated from respiratory tract tissues, and 16S rRNA gene sequencing on three isolates revealed two distinct genotypes, one previously associated with some electrophoretic type (ET) 1 strains and the other a novel genotype that clustered among sequences previously associated with ET 3, ET 4, ET 5 and ET 6 isolates. The localization of ORT within the lung tissue was demonstrated by fluorescent in-situ hybridization in the bronchial exudate of three cases, although not within the granulomatous lesions themselves. In each case, ORT was identified as part of a complex of other respiratory agents including avian paramyxovirus type 2, avian coronavirus, Mycoplasma gallisepticum, Mycoplasma synoviae and other Mycoplasma species, Escherichia coli, Pasteurella multocida, other Pasteurellaceae and Syngamus trachea, suggesting synergism with other agents. Exposure to other intercurrent factors, including adverse weather conditions and internal parasitism, may also have exacerbated the severity of disease.

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Detection of IBV QX in commercial broiler flocks in the UK

Cited by 16 publications

References 14 publications

Detection of infectious bronchitis virus strains similar to Japan in Taiwan

Detection of infectious bronchitis virus strains similar to Japan in Taiwan

An overview of infectious bronchitis virus in chickens

Demonstration ofOrnithobacterium rhinotrachealein pheasants (Phasianus colchicus) with pneumonia and airsacculitis

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