Surveillance of Influenza Viruses in Waterfowl Used As Decoys in Andalusia, Spain
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Autor/a
Jurado-Tarifa, EstefanÍa
Gómez-Pacheco, Juan Manuel
Fernández-Morente, Manuel
Jaén-Téllez, Juan Antonio
Arenas, Antonio
García-Bocanegra, Ignacio
Fecha de publicación
2014-06-05ISSN
1932-6203
Resumen
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%, CI95%: 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 emagglutination
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.
Tipo de documento
Artículo
Versión del documento
Versión publicada
Lengua
English
Materias (CDU)
619 - Veterinaria
Páginas
8
Publicado por
Public Library of Science
Publicado en
PLoS ONE
Citación
Jurado-Tarifa, Estefanía, Sebastian Napp, Juan Manuel Gómez-Pacheco, Manuel Fernández-Morente, Juan Antonio Jaén-Téllez, Antonio Arenas, and Ignacio García-Bocanegra. 2014. "Surveillance Of Influenza Viruses In Waterfowl Used As Decoys In Andalusia, Spain". Plos ONE 9 (6): e98890. doi:10.1371/journal.pone.0098890.
Program
Sanitat Animal
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