A 10-year retrospective study of inclusion body hepatitis in meat-type chickens in spain (2011-2021)
Bertran, Kateri (Institut de Recerca i Tecnologia Agroalimentàries. Centre de Recerca en Sanitat Animal)
Blanco, Angela (Centre de Sanitat Avícola de Catalunya i Aragó)
Antilles, Noelia (Centre de Sanitat Avícola de Catalunya i Aragó)
Nofrarías Espadamala, Miquel (Institut de Recerca i Tecnologia Agroalimentàries. Centre de Recerca en Sanitat Animal)
Valle, Rosa M. (Institut de Recerca i Tecnologia Agroalimentàries. Centre de Recerca en Sanitat Animal)
Cobos Arnalot, Àlex (Institut de Recerca i Tecnologia Agroalimentàries. Centre de Recerca en Sanitat Animal)
Ramis Salva, Antonio José (Universitat Autònoma de Barcelona. Departament de Patologia i de Producció Animals)
Biarnés, Mar (Centre de Sanitat Avícola de Catalunya i Aragó)
Majó i Masferrer, Natàlia (Universitat Autònoma de Barcelona. Departament de Sanitat i d'Anatomia Animals)

Date:	2021
Abstract:	A surge in fowl adenovirus (FAdV) causing inclusion body hepatitis (IBH) outbreaks has occurred in several countries in the last two decades. In Spain, a sharp increase in case numbers in broilers and broiler breeder pullets arose since 2011, which prompted the vaccination of breeders in some regions. Our retrospective study of IBH cases in Spain from 2011 to 2021 revealed that most cases were reported in broilers (92. 21%) and were caused by serotypes FAdV-8b and-11, while cases in broiler breeder pullets were caused by serotypes FAdV-2,-11, and-8b. Vertical transmission was the main route of infection, although horizontal transmission likely happened in some broiler cases. Despite the inconsistent and heterogeneous use of vaccines among regions and over time, the number of cases mirrored the use of vaccines in the country. While IBH outbreaks were recorded year-long, significantly more cases occurred during the cooler and rainier months. The geographic distribution suggested a widespread incidence of IBH and revealed the importance of a highly integrated system. Our findings contribute to a better understanding of FAdV infection dynamics under field conditions and reiterate the importance of surveillance, serological monitoring of breeders, and vaccination of breeders against circulating serotypes to protect progenies.
Grants:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2017 BP 00105
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Fowl adenovirus ; Inclusion body hepatitis ; Spain ; Epidemiology ; Broilers ; Broiler breeder pullets ; Phylogenetic analysis
Published in:	Viruses, Vol. 13 Núm. 11 (november 2021) , p. 2170, ISSN 1999-4915

DOI: 10.3390/v13112170
PMID: 34834976

11 p, 2.6 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Health sciences and biosciences > Centre de Recerca en Sanitat Animal (CReSA-IRTA)
Articles > Research articles
Articles > Published articles