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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Evolution to predominance of swine influenza virus hemagglutinin mutants of predictable phenotype during single infections of the natural host.

L and H2 mutants of the A/NJ/11/76 H1N1 strain of swine influenza virus differ by having either a lysine or a glutamic acid at position 153 of the hemagglutinin glycoprotein of the virus. In two separate experiments, experimental infection of swine with various doses of the H2 mutant resulted in the emergence in 11 of 20 animals of virus with the L phenotype. All evidence indicates that the H2----L mutation, selection, and evolution to predominance occurred within the 7-day span of individual infections. L and H2 mutations appear to act as alleles in the adaptation of virus, respectively, to natural and laboratory hosts. Although the gradual evolution of mutants during sequential infections is commonplace, the present recognition of rapid and predictable evolution of mutants of increased replication efficiency and specific phenotype in the natural host, to our knowledge, is unprecedented.[1]

References

  1. Evolution to predominance of swine influenza virus hemagglutinin mutants of predictable phenotype during single infections of the natural host. Kilbourne, E.D., Easterday, B.C., McGregor, S. Proc. Natl. Acad. Sci. U.S.A. (1988) [Pubmed]
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