Retrospective study on transmissible viral proventriculitis and chicken proventricular necrosis virus (CPNV) in the UK
Visualitza/Obre
Autor/a
Grau-Roma, Llorenç
Schock, Alex
Nofrarías, Miquel
Wali, Nabil Ali
de Fraga, Aline Padilha
Garcia-Rueda, Cristina
de Brot, Simone
Majó, Natalia
Data de publicació
2019-10-21ISSN
0307-9457
Resum
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.
Tipus de document
Article
Versió del document
Versió acceptada
Llengua
English
Matèries (CDU)
619 - Veterinària
Pàgines
19
Publicat per
Taylor & Francis
Publicat a
Avian Pathology
Citació
Grau-Roma, Llorenç, Alex Schock, Miquel Nofrarías, Nabil Ali Wali, Aline Padilha de Fraga, Cristina Garcia-Rueda, Simone de Brot, and Natalia Majó. 2020. "Retrospective Study On Transmissible Viral Proventriculitis And Chicken Proventricular Necrosis Virus (CPNV) In The UK”. Avian Pathology. Taylor & Francis. doi:10.1080/03079457.2019.1677856.
Programa
Sanitat Animal
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