Giuseppe
Emeritus
Pandemic (H1N1) 2009 Virus Reassortment (Emerg Infect Dis., abstract, edited)
[Source: US Centers for Disease Control and Prevention, Emerging Infectious Diseases Journal, full text: <cite cite="http://www.cdc.gov/eid/content/17/2/200.htm">Pandemic (H1N1) 2009 Virus Reassortment | CDC EID</cite>. Abstract, edited.]
Volume 17, Number 2?February 2011
Research
Possible Increased Pathogenicity of Pandemic (H1N1) 2009 Influenza Virus upon Reassortment
Eefje J.A. Schrauwen, Sander Herfst, Salin Chutinimitkul, Theo M. Bestebroer, Guus F. Rimmelzwaan, Albert D.M.E. Osterhaus, Thijs Kuiken, and Ron A.M. Fouchier
Author affiliation: National Influenza Centre and Erasmus Medical Center Department of Virology, Rotterdam, the Netherlands
Abstract
Since emergence of the pandemic (H1N1) 2009 virus in April 2009, three influenza A viruses?seasonal (H3N2), seasonal (H1N1), and pandemic (H1N1) 2009?have circulated in humans. Genetic reassortment between these viruses could result in enhanced pathogenicity. We compared 4 reassortant viruses with favorable in vitro replication properties with the wild-type pandemic (H1N1) 2009 virus with respect to replication kinetics in vitro and pathogenicity and transmission in ferrets. Pandemic (H1N1) 2009 viruses containing basic polymerase 2 alone or in combination with acidic polymerase of seasonal (H1N1) virus were attenuated in ferrets. In contrast, pandemic (H1N1) 2009 with neuraminidase of seasonal (H3N2) virus resulted in increased virus replication and more severe pulmonary lesions. The data show that pandemic (H1N1) 2009 virus has the potential to reassort with seasonal influenza viruses, which may result in increased pathogenicity while it maintains the capacity of transmission through aerosols or respiratory droplets.
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------<cite cite="http://www.cdc.gov/eid/content/17/2/200.htm"></cite>
[Source: US Centers for Disease Control and Prevention, Emerging Infectious Diseases Journal, full text: <cite cite="http://www.cdc.gov/eid/content/17/2/200.htm">Pandemic (H1N1) 2009 Virus Reassortment | CDC EID</cite>. Abstract, edited.]
Volume 17, Number 2?February 2011
Research
Possible Increased Pathogenicity of Pandemic (H1N1) 2009 Influenza Virus upon Reassortment
Eefje J.A. Schrauwen, Sander Herfst, Salin Chutinimitkul, Theo M. Bestebroer, Guus F. Rimmelzwaan, Albert D.M.E. Osterhaus, Thijs Kuiken, and Ron A.M. Fouchier
Author affiliation: National Influenza Centre and Erasmus Medical Center Department of Virology, Rotterdam, the Netherlands
Abstract
Since emergence of the pandemic (H1N1) 2009 virus in April 2009, three influenza A viruses?seasonal (H3N2), seasonal (H1N1), and pandemic (H1N1) 2009?have circulated in humans. Genetic reassortment between these viruses could result in enhanced pathogenicity. We compared 4 reassortant viruses with favorable in vitro replication properties with the wild-type pandemic (H1N1) 2009 virus with respect to replication kinetics in vitro and pathogenicity and transmission in ferrets. Pandemic (H1N1) 2009 viruses containing basic polymerase 2 alone or in combination with acidic polymerase of seasonal (H1N1) virus were attenuated in ferrets. In contrast, pandemic (H1N1) 2009 with neuraminidase of seasonal (H3N2) virus resulted in increased virus replication and more severe pulmonary lesions. The data show that pandemic (H1N1) 2009 virus has the potential to reassort with seasonal influenza viruses, which may result in increased pathogenicity while it maintains the capacity of transmission through aerosols or respiratory droplets.
-
------<cite cite="http://www.cdc.gov/eid/content/17/2/200.htm"></cite>