Pathobiology of the highly pathogenic avian influenza viruses H7N1 and H5N8 in different chicken breeds and role of Mx 2032 G/A polymorphism in infection outcome
Sánchez-González, Raúl (Universitat Autònoma de Barcelona. Departament de Sanitat i d'Anatomia Animals)
Ramis Salva, Antonio José (Universitat Autònoma de Barcelona. Departament de Sanitat i d'Anatomia Animals)
Nofrarías Espadamala, Miquel (Institut de Recerca i Tecnologia Agroalimentàries. Centre de Recerca en Sanitat Animal)
Wali, Nabil Ali (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)
Pérez-Maíllo, Mónica (Institut de Recerca i Tecnologia Agroalimentàries. Centre de Recerca en Sanitat Animal)
Perlas Puente, Albert (Universitat Autònoma de Barcelona. Departament de Sanitat i d'Anatomia Animals)
Majó i Masferrer, Natàlia (Universitat Autònoma de Barcelona. Departament de Sanitat i d'Anatomia Animals)

Fecha:	2020
Resumen:	Chickens are highly susceptible to highly pathogenic avian influenza viruses (HPAIVs). However, the severity of infection varies depending of the viral strain and the genetic background of the host. In this study, we evaluated the pathogenesis of two HPAIVs (H7N1 and H5N8) and assessed the susceptibility to the infection of local and commercial chicken breeds from Spain. Eight chicken breeds were intranasally inoculated with 10 5 ELD of A/Chicken/Italy/5093/1999 (H7N1) or A/Goose/Spain/IA17CR02699/2017 (H5N8 clade 2. 3. 4. 4. B) and monitored during 10 days. Chickens were highly susceptible to both HPAIVs, but H7N1 was considerably more virulent than H5N8 as demonstrated by the highest mortality rates and shortest mean death times (MDT). Both HPAIVs produced severe necrosis and intense viral replication in the central nervous system, heart and pancreas; however, the lesions and replication in other tissues were virus-dependent. High levels of viral RNA were detected by the oral route with both viruses. In contrast, a low number of H5N8-inoculated chickens shed by the cloacal route, demonstrating a different pattern of viral shedding dependent of the HPAIV. We found a high variation in the susceptibility to HPAIVs between the different chicken breeds. The birds carrying the genotype AA and AG at position 2032 in chicken Mx gene presented a slightly higher, but not significant, percentage of survival and a statistically significant longer MDT than GG individuals. Our study demonstrated that the severity of HPAI infection is largely dependent of the viral isolate and host factors, underlining the complexity of HPAI infections.
Ayudas:	Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria RTA2015-00088-C03-03
Nota:	Altres ajuts: Agencia de Gestión de Ayudas Universitarias y de Investigación (AGAUR). FI-DGR Pre-Doctoral Grant
Derechos:	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.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Highly pathogenic avian influenza ; Gs/GD lineage ; Classical strain ; Chickens ; Breed ; Pathogenicity
Publicado en:	Veterinary research, Vol. 51 (september 2020) , ISSN 1297-9716

DOI: 10.1186/s13567-020-00835-4
PMID: 32912265

13 p, 2.7 MB

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Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias de la salud y biociencias > Centre de Recerca en Sanitat Animal (CReSA-IRTA)
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