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The first identified case of pandemic H1N1 influenza in pigs in Australia
Author(s) -
Holyoake PK,
Kirkland PD,
Davis RJ,
Arzey KE,
Watson J,
Lunt RA,
Wang J,
Wong F,
Moloney BJ,
Dunn SE
Publication year - 2011
Publication title -
australian veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.382
H-Index - 59
eISSN - 1751-0813
pISSN - 0005-0423
DOI - 10.1111/j.1751-0813.2011.00844.x
Subject(s) - outbreak , virus , pandemic , virology , herd , serology , transmission (telecommunications) , veterinary medicine , veterinary virology , biology , human mortality from h5n1 , influenza a virus subtype h5n1 , influenza a virus , virus isolation , medicine , antibody , disease , covid-19 , immunology , infectious disease (medical specialty) , electrical engineering , engineering
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.