A 10-Year Retrospective Study of Inclusion Body Hepatitis in Meat-Type Chickens in Spain (2011–2021)

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 region...

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Autores principales:	Kateri Bertran, Angela Blanco, Noelia Antilles, Miquel Nofrarías, Rosa M. Valle, Àlex Cobos, Antonio Ramis, Mar Biarnés, Natàlia Majó
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	fowl adenovirus inclusion body hepatitis Spain epidemiology broilers broiler breeder pullets Microbiology QR1-502
Acceso en línea:	https://doaj.org/article/c5e409ee7d0741c092cd09730e9e2b72
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spelling	oai:doaj.org-article:c5e409ee7d0741c092cd09730e9e2b722021-11-25T19:13:00ZA 10-Year Retrospective Study of Inclusion Body Hepatitis in Meat-Type Chickens in Spain (2011–2021)10.3390/v131121701999-4915https://doaj.org/article/c5e409ee7d0741c092cd09730e9e2b722021-10-01T00:00:00Zhttps://www.mdpi.com/1999-4915/13/11/2170https://doaj.org/toc/1999-4915A 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.Kateri BertranAngela BlancoNoelia AntillesMiquel NofraríasRosa M. ValleÀlex CobosAntonio RamisMar BiarnésNatàlia MajóMDPI AGarticlefowl adenovirusinclusion body hepatitisSpainepidemiologybroilersbroiler breeder pulletsMicrobiologyQR1-502ENViruses, Vol 13, Iss 2170, p 2170 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	fowl adenovirus inclusion body hepatitis Spain epidemiology broilers broiler breeder pullets Microbiology QR1-502
spellingShingle	fowl adenovirus inclusion body hepatitis Spain epidemiology broilers broiler breeder pullets Microbiology QR1-502 Kateri Bertran Angela Blanco Noelia Antilles Miquel Nofrarías Rosa M. Valle Àlex Cobos Antonio Ramis Mar Biarnés Natàlia Majó A 10-Year Retrospective Study of Inclusion Body Hepatitis in Meat-Type Chickens in Spain (2011–2021)
description	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.
format	article
author	Kateri Bertran Angela Blanco Noelia Antilles Miquel Nofrarías Rosa M. Valle Àlex Cobos Antonio Ramis Mar Biarnés Natàlia Majó
author_facet	Kateri Bertran Angela Blanco Noelia Antilles Miquel Nofrarías Rosa M. Valle Àlex Cobos Antonio Ramis Mar Biarnés Natàlia Majó
author_sort	Kateri Bertran
title	A 10-Year Retrospective Study of Inclusion Body Hepatitis in Meat-Type Chickens in Spain (2011–2021)
title_short	A 10-Year Retrospective Study of Inclusion Body Hepatitis in Meat-Type Chickens in Spain (2011–2021)
title_full	A 10-Year Retrospective Study of Inclusion Body Hepatitis in Meat-Type Chickens in Spain (2011–2021)
title_fullStr	A 10-Year Retrospective Study of Inclusion Body Hepatitis in Meat-Type Chickens in Spain (2011–2021)
title_full_unstemmed	A 10-Year Retrospective Study of Inclusion Body Hepatitis in Meat-Type Chickens in Spain (2011–2021)
title_sort	10-year retrospective study of inclusion body hepatitis in meat-type chickens in spain (2011–2021)
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c5e409ee7d0741c092cd09730e9e2b72
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A 10-Year Retrospective Study of Inclusion Body Hepatitis in Meat-Type Chickens in Spain (2011–2021)

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