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Two years of surveillance of influenza a virus infection in a swine herd. Results of virological, serological and pathological studies
Abstract
Swine farms provide a dynamic environment for the evolution of influenza A viruses (IAVs). The present report shows the results of a surveillance effort of IAV infection in one commercial swine farm in Argentina. Two cross-sectional serological and virological studies (n = 480) were carried out in 2011 and
2012. Virus shedding was detected in nasal samples from pigs from ages 7, 21 and 42-days old. More than 90% of sows and gilts but less than 40% of
[ver mas...]
Swine farms provide a dynamic environment for the evolution of influenza A viruses (IAVs). The present report shows the results of a surveillance effort of IAV infection in one commercial swine farm in Argentina. Two cross-sectional serological and virological studies (n = 480) were carried out in 2011 and
2012. Virus shedding was detected in nasal samples from pigs from ages 7, 21 and 42-days old. More than 90% of sows and gilts but less than 40% of 21-days old piglets had antibodies against IAV. In addition, IAV was detected in 8/17 nasal swabs and 10/15 lung samples taken from necropsied pigs. A subset of these
samples was further processed for virus isolation resulting in 6 viruses of the H1N2 subtype (ı2 cluster).
Pathological studies revealed an association between suppurative bronchopneumonia and necrotizing bronchiolitis with IAV positive samples. Statistical analyses showed that the degree of lesions in bronchi, bronchiole, and alveoli was higher in lungs positive to IAV. The results of this study depict the relevance of continuing long-term active surveillance of IAV in swine populations to establish IAV evolution relevant to swine and humans.
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![Thumbnail](/bitstream/handle/20.500.12123/937/CIMID-cov150h.gif?sequence=2&isAllowed=y)
Author
Cappuccio, Javier Alejandro;
Dibarbora, Marina;
Lozada, María Inés;
Quiroga, María Alejandra;
Olivera, Valeria Soledad;
Dangelo, Marta;
Pérez, Estefanía Marisol;
Barrales, Hernán;
Perfumo, Carlos Juan;
Pereda, Ariel Julian;
Pérez, Daniel R.;
Fuente
Comparative Immunology, Microbiology and Infectious Diseases 50 : 110-115
Date
2017
ISSN
0147-9571
Formato
pdf
Tipo de documento
article
Palabras Claves
Derechos de acceso
Abierto
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