tetano
Editor, Senior Moderator
The first identified case of pandemic H1N1 influenza in pigs in Australia
PK Holyoake1,
PD Kirkland2,
RJ Davis2,
KE Arzey2,
J Watson3,
RA Lunt3,
J Wang3,
F Wong3,
BJ Moloney4,
SE Dunn4
Article first published online: 18 OCT 2011
DOI: 10.1111/j.1751-0813.2011.00844.x
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.
http://onlinelibrary.wiley.com/doi/...ionid=5079EF7A9F21F35390AB1C20BFC705E1.d01t03
PK Holyoake1,
PD Kirkland2,
RJ Davis2,
KE Arzey2,
J Watson3,
RA Lunt3,
J Wang3,
F Wong3,
BJ Moloney4,
SE Dunn4
Article first published online: 18 OCT 2011
DOI: 10.1111/j.1751-0813.2011.00844.x
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.
http://onlinelibrary.wiley.com/doi/...ionid=5079EF7A9F21F35390AB1C20BFC705E1.d01t03