Surveillance of Influenza Viruses in Waterfowl Used As Decoys in Andalusia, Spain
Jurado-Tarifa, Estefanía (Universidad de Córdoba. Departamento de Sanidad Animal)
Napp Avelli, Sebastián (Institut de Recerca i Tecnologia Agroalimentàries. Centre de Recerca en Sanitat Animal)
Gómez-Pacheco, Juan Manuel (Consejería de Agricultura, Pesca y Desarrollo Rural de la Junta de Andalucía. Laboratorio de Sanidad y Producción Animal)
Fernández-Morente, Manuel (Consejería de Agricultura, Pesca y Desarrollo Rural de la Junta de Andalucía. Servicio de Sanidad Animal)
Jaén-Téllez, Juan Antonio (Consejería de Agricultura, Pesca y Desarrollo Rural de la Junta de Andalucía. Agencia de Gestión Agraria y Pesquera de Andalucía)
Arenas Montes, Antonio (Universidad de Córdoba. Departamento de Sanidad Animal)
García-Bocanegra, Ignacio (Universidad de Córdoba. Departamento de Sanidad Animal)

Date:	2014
Abstract:	A longitudinal study was carried out to determine the seroprevalence of avian influenza viruses (AIVs) in waterfowl used as decoys in Andalusia, southern Spain. A total of 2319 aquatic birds from 193 flocks were analyzed before and after the hunting season 2011-2012. In the first sampling, 403 out of 2319 (18. 0%, CI: 15. 8-19. 0) decoys showed antibodies against AIVs by ELISA. The AI seroprevalence was significantly higher in geese (21. 0%) than in ducks (11. 7%) (P <0. 001). Besides, the spatial distribution of AIVs was not homogeneous as significant differences among regions were observed. The prevalence of antibodies against AIVs subtypes H5 and H7 were 1. 1% and 0. 3%, respectively, using hemagglutination inhibition test (HI). The overall and H5 seroprevalences slightly increased after the hunting period (to 19. 2% and 1. 4%, respectively), while the H7 seroprevalence remained at the same level (0. 3%). The proportion of flocks infected by AIVs was 65. 3%, while 11. 2% and 4. 9% of flocks were positive for H5 and H7, respectively. Viral shedding was not detected in any of the 47 samples positive by both ELISA and HI, tested by RRT-PCR. The individual incidence after the hunting season was 3. 4%. The fact that 57 animals seroconverted, 15 of which were confirmed by HI (12 H5 and 3 H7), was indication of contact with AIVs during the hunting period. The results indicate that waterfowl used as decoys are frequently exposed to AIVs and may be potentially useful as sentinels for AIVs monitoring. The seroprevalence detected and the seropositivity against AIVs H5 and H7, suggest that decoys can act as reservoirs of AIVs, which may be of animal and public health concern.
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:	Influenza virus
Published in:	PloS one, Vol. 9 (june 2014) , ISSN 1932-6203

DOI: 10.1371/journal.pone.0098890
PMID: 24901946

8 p, 424.1 KB

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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