Retrospective study on transmissible viral proventriculitis and chicken proventricular necrosis virus (CPNV) in the UK.

Grau-Roma, Llorenç; Schock, Alex; Nofrarías, Miquel; Ali Wali, Nabil; de Fraga, Aline Padilha; Garcia-Rueda, Cristina; De Brot, Simone; Majó, Natalia (2020). Retrospective study on transmissible viral proventriculitis and chicken proventricular necrosis virus (CPNV) in the UK. Avian pathology, 49(1), pp. 99-105. Taylor & Francis 10.1080/03079457.2019.1677856

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Chicken proventricular necrosis virus (CPNV) is a recently described birnavirus, which has been proposed to be the cause of transmissible viral proventriculitis (TVP). The understanding of the epidemiology of both the virus and the disease is very limited. A retrospective investigation on TVP and CPNV in broiler chicken submissions from the UK from between 1994 and 2015 was performed with the aims of assessing the longitudinal temporal evolution of TVP and CPNV, and to review the histological proventricular lesions in the studied chickens. Ninety-nine of the 135 included submissions (73.3%) fulfilled the TVP-diagnostic criteria, while the remaining 36 submissions (26.7%) displayed only lymphocytic proventriculitis (LP). The first detection of CPNV by PCR dated from 2009. Results showed a rise in the number of both TVP and positive CPNV RT-PCR submissions from 2009 with a peak in 2013, suggesting that they may be an emerging or re-emerging disease and pathogen, respectively. Twenty-two out of the 99 submissions displaying TVP lesions (22%) and four out of the 36 (11%) submissions with LP gave positive CPNV RT-PCR results, further supporting the association between CPNV and TVP and confirming that CPNV is present in a low proportion of proventriculi that do not fulfil the TVP-diagnostic criteria. In addition, intranuclear inclusion bodies were observed in 22 of the submissions with TVP. The vast majority of these cases (21 of 22, 96%) gave negative CPNV RT-PCR results, raising the question of whether a virus other than CPNV is responsible for some of these TVP-affected cases.RESEARCH HIGHLIGHTSTVP and CPNV have been present in British broilers since at least 1994 and 2009, respectively.TVP and CPNV seem to be an emerging and re-emerging disease and pathogen, respectively.CPNV was detected in proventriculi with both TVP and LP-lesions.Viruses other than CPNV may be responsible for some TVP-affected cases.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Research Foci > Host-Pathogen Interaction
05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP) > Institute of Animal Pathology

UniBE Contributor:

Grau Roma, Llorenç and De Brot, Simone Danielle

Subjects:

500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health
600 Technology > 630 Agriculture

ISSN:

1465-3338

Publisher:

Taylor & Francis

Language:

English

Submitter:

Achim Braun Parham

Date Deposited:

11 Mar 2020 14:53

Last Modified:

11 Mar 2020 14:53

Publisher DOI:

10.1080/03079457.2019.1677856

PubMed ID:

31591909

Uncontrolled Keywords:

Birnavirus chicken proventricular necrosis virus (CPNV) natural infection poultry retrospective study transmissible viral proventriculitis (TVP)

BORIS DOI:

10.7892/boris.140653

URI:

https://boris.unibe.ch/id/eprint/140653

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