Assessment of exposure to influenza A viruses in pigs between weaning and market age
| Autor: | Éva Nagy, Helena Grgić, Robert M. Friendship, Greg Wideman, Juliana B. Ferreira, Zvonimir Poljak |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Swine
viruses Veterinary medicine Sus scrofa Population Weaning Biology Antibodies Viral medicine.disease_cause Virus Antibodies Serology Influenza A Virus H1N1 Subtype Orthomyxoviridae Infections SF600-1100 Prevalence Influenza A virus medicine Animals Co-circulation Animal Husbandry education Ontario Swine Diseases Molecular Epidemiology education.field_of_study General Veterinary Molecular epidemiology Incidence Influenza A Virus H3N2 Subtype Antibody titer Respiratory infection Virology Antibody Formation biology.protein Female Antibody Research Article |
| Zdroj: | Veterinary Research, Vol 52, Iss 1, Pp 1-14 (2021) Veterinary Research |
| ISSN: | 1297-9716 |
| Popis: | Influenza A viruses (IAVs) are common causes of respiratory infection in pigs. The objective of this study was to characterize the circulation of IAVs between weaning and market age on the basis of development of antibody response and molecular epidemiology of detected viruses. Two batches of weaned pigs were followed in the nursery and finisher barns with a sample of 81 and 75 pigs. Nasal swabs and blood samples were collected from individual pigs for virological and serological analyses. A H3N2 subtype virus, of cluster IV, was detected in Study 1, with a maximum of 97.9% identity to HA gene of viruses previously isolated in Ontario. In Study 2, a H1N1 subtype virus, of 2009 H1N1 pandemic lineage, was detected, with a maximum of 97.8% identity to HA gene of viruses previously isolated in Ontario. On the basis of HA gene, it was observed that pigs were being detected with the same virus over time. The existence of antibody titers for IAV other than the isolated one confirmed that more than one subtype can circulate in the same population. In Study 1, pigs with higher numbers of IAV detection had lower serological titers for the same virus that was confirmed to circulate in the nursery (P |
| Databáze: | OpenAIRE |
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