2011/10/18 by PK Holyoake, P. K. Holyoake, PD Kirkland +15 · 1 citation
Agricultural and Biological Sciences · Medicine · #Animal Disease Management and Epidemiology #Influenza Virus Research Studies #Viral gastroenteritis research and epidemiology
paper · doi:10.1111/j.1751-0813.2011.00844.x
crossref issued 2011/10/18 · crossref published 2011/10/18 · crossref published-online 2011/10/18 · openalex publication_date 2011/10/18 · crossref created 2011/10/18 · crossref published-print 2011/11/01 · crossref deposited 2021/07/07 · openalex created_date 2025/10/10 · crossref indexed 2026/07/24 · openalex updated_date 2026/07/29
A 300-sow farrow-to-finish herd in New South Wales was infected with influenza pandemic (H1N1) 2009 (H1N1/09) virus in July 2009 and became the first recorded case of influenza in pigs in Australia. The outbreak resulted from human-to-pig transmission. Clinical signs in affected pigs were mild compared with overseas reports of 'classical' swine influenza virus and included coughing and decreased appetite in a small proportion of non-lactating breeding stock, weaners, growers and finishers. A diagnosis of H1N1/09 influenza virus infection was confirmed using a combination of serology (haemagglutination inhibition, blocking enzyme-linked immunosorbent assay) and real-time reverse transcription polymerase chain reaction. Attempts at virus isolation were unsuccessful. Results of a longitudinal study of pigs on this farm suggested that the virus continued to circulate for 9 weeks after the onset of infection, but was not present 6 months later. This report highlights the difficulties in preventing transmission of H1N1/09 influenza virus from infected humans to pigs during a human pandemic.