Valsts valodas centra izstrādātie bioloģijas un tās apakšnozaru termini

Konteksts: [..] The virus might evolve and change its virulence leading to an increased severity of the disease in poultry/birds. However, to date the pandemic influenza virus isolated from humans has remained relatively stable without signs of significant 'drifting' (undergoing slight genetic changes) or 'shifting' (undergoing substantial genetic changes). Up to now only viruses of the H5 and H7 subtypes have shown to mutate to highly pathogenic viruses when introduced to poultry. There are no substantive data indicating that the pandemic influenza virus is likely to develop increased virulence for birds, humans or mammalian species. [..]
Avots: Working document on surveillance/monitoring and control measures for the pandemic (H1N1) 2009 influenza virus in poultry